U.S. patent application number 12/148354 was filed with the patent office on 2011-12-15 for wireless microwave interferer for destructing, disabling, or jamming a trigger of an improvised explosive device.
Invention is credited to Saulius Janusas.
Application Number | 20110304494 12/148354 |
Document ID | / |
Family ID | 44994348 |
Filed Date | 2011-12-15 |
United States Patent
Application |
20110304494 |
Kind Code |
A1 |
Janusas; Saulius |
December 15, 2011 |
WIRELESS MICROWAVE INTERFERER FOR DESTRUCTING, DISABLING, OR
JAMMING A TRIGGER OF AN IMPROVISED EXPLOSIVE DEVICE
Abstract
A wireless microwave interferer for destructing, disabling, or
jamming a trigger of an improvised explosive device. The interferer
includes a power source interface, a control and monitoring panel,
a waveform generator, a modulated HV power supply, at least one
microwave generator, a waveguide to co-ax transformer and combiner,
one of an ellipsoidal antenna and a spiral antenna, and an antenna
adjustment mechanism. The power source interface interfaces with a
power source. The waveform generator is connected to the modulated
HV power supply and to the control and monitoring panel. The
control and monitoring panel is connected to the power source
interface, the modulated HV power supply, and the antenna
adjustment mechanism. The modulated HV power supply is connected to
the at least one microwave generator. The at least one microwave
generator is connected to the waveguide to co-ax transformer and
combiner. The waveguide to co-ax transformer and combiner is
connected to the one of the ellipsoidal antenna and the spiral
antenna. The one of the ellipsoidal antenna and the spiral antenna
is connected to the antenna adjustment mechanism.
Inventors: |
Janusas; Saulius; (Sea
Cliff, NY) |
Family ID: |
44994348 |
Appl. No.: |
12/148354 |
Filed: |
April 18, 2008 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60925610 |
Apr 20, 2007 |
|
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Current U.S.
Class: |
342/14 |
Current CPC
Class: |
H04K 3/44 20130101; H04K
3/43 20130101; H04K 2203/32 20130101; H04K 3/92 20130101; H04K 3/62
20130101; H04K 2203/24 20130101 |
Class at
Publication: |
342/14 |
International
Class: |
G01S 7/38 20060101
G01S007/38 |
Claims
1. A wireless microwave interferer for destructing, disabling, or
jamming a trigger of an improvised explosive device, comprising: a)
a waveform generator; b) at least one microwave generator; c) a
waveguide to co-ax transformer and combiner; and d) an ellipsoidal
antenna; wherein said at least one microwave generator is connected
to said waveguide to co-ax transformer and combiner; and wherein
said waveguide to co-ax transformer and combiner is connected to
said ellipsoidal antenna.
2. The interferer of claim 1, further comprising a power source
interface; wherein said power source interface is for interfacing
with a power source.
3. The interferer of claim 2, further comprising a control and
monitoring panel; wherein said waveform generator is connected to
said control and monitoring panel; and wherein said control and
monitoring panel is connected to said power source interface.
4. The interferer of claim 3, further comprising a modulated HV
power supply; wherein said waveform generator is connected to said
modulated HV power supply; wherein said control and monitoring
panel is connected to said modulated HV power supply; and wherein
said modulated HV power supply is connected to said at least one
microwave generator.
5. The interferer of claim 4, further comprising an antenna
adjustment mechanism; wherein said control and monitoring panel is
connected to said antenna adjustment mechanism; and wherein said
ellipsoidal antenna is connected to said antenna adjustment
mechanism.
6. The interferer of claim 1, wherein said wireless microwave
interferer generates a high power 2.46 GHZ adjustable-geometry,
modulated, microwave beam.
7. The interferer of claim 2, wherein said power source is one of
standard house current of 120/240 VAC and 50/60 Hz,
military/aviation power of 120/240 VAC and 400 Hz, and automotive
of 12/24 VDC; wherein said automotive of 12/24 VDC has an inverter;
and wherein said inverter of said automotive of 12/24 VDC converts
DC to one of the standard house current of 120/240 VAC and 50/60 Hz
and the military/aviation power of 120/240 VAC and 400 Hz.
8. The interferer of claim 5, wherein said control and monitoring
panel controls said wave form generator; wherein said control and
monitoring panel controls said modulated HV power supply; and
wherein said control and monitoring panel controls said antenna
adjustment mechanism.
9. The interferer of claim 1, wherein said wave form generator
generates a number of different selectable waveforms tailored to
have maximum effectiveness on different classes of targets.
10. The interferer of claim 5, wherein said modulated HV power
supply provides all necessary voltages and signals for said
wireless microwave interferer; wherein low voltages feed said wave
form generator; wherein said low voltages feed filaments of high
power RF devices; wherein said low voltages feed said antenna
adjustment mechanism; wherein said low voltages feed performance
indicators; wherein a High Voltage/High Power section of said power
supply responds to signals from said at least one microwave
generator; and wherein said High Voltage/High Power section of said
power supply converts said signals from said at least one microwave
generator into high power signals that feed said high power RF
devices.
11. The interferer of claim 4, wherein said at least one microwave
generator is a magnetron; and wherein said magnetron converts high
power modulated signals from said modulated HV power supply into
high power, modulated, microwave jamming signals.
12. The interferer of claim 11, wherein when said magnetron is only
one magnetron, jamming mode is rectification; wherein when said
magnetron is two magnetrons activated simultaneously, modes of
jamming are active, rectification, and spectrum generation; wherein
said magnetron operates at a high duty-cycle; and wherein said
magnetron is cooled by a cooling system.
13. The interferer of claim 12, wherein said waveguide to co-ax
transformer and combiner combines High Power Microwave signals from
said two magnetrons; and wherein said waveguide to co-ax
transformer and combiner converts said signals into a single
co-axial mode output port.
14. The interferer of claim 1, wherein said ellipsoidal antenna
directs microwave signals against the improvised explosive device
that is to be destructed, disabled, or jammed; wherein said
ellipsoidal antenna concentrates its power in a beam over short
ranges; wherein said ellipsoidal antenna is a dish-type antenna;
wherein said dish-type antenna has an ellipsoidal rather than
paraboloid surface contour.
Description
1. CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The instant non-provisional patent application claims
priority from provisional patent application No. 60/925,610, filed
on Apr. 20, 2007, entitled ANTI-IMPROVISED EXPLOSIVE DEVICE
APPARATUS AND RELATED METHOD, and incorporated herein by reference
thereto.
2. BACKGROUND OF THE INVENTION
[0002] A. Field of the Invention.
[0003] the embodiments of the present invention relate to an
interferer for jamming a trigger of an explosive device, and more
particularly, the embodiments of the present invention relate to a
wireless microwave interferer for destructing, disabling, or
jamming a trigger of an improvised explosive device.
[0004] B. Description of the Prior Art.
[0005] All modern electronic products utilize printed circuit board
("PCB") technology of many different types to physically mount, and
electrically connect, electronic components to form a functioning
electronic system. The PCB is a flat insulator upon which are many
printed lands, i.e., conductors that serve as wires, to
interconnect all of the electronic components. Most lands have at
least two ends, with the majority of them being electrically
connected to pins of integrated circuits ("ICs") and other
electronic components.
[0006] When the lands are exposed to microwave radiation, they act
as antennas and convert the microwave radiation into microwave
frequency AC currents that are introduced directly into the
electronic components. As a result of diode rectification, DC
voltages and pulses appear on the terminals and on the interiors of
the semiconductor components of the ICs. In this circuitry, stray
capacitances from filters result in an appearance of unwanted
steady DC levels that alter their delicate and critical bias
conditions, which is equivalent to connecting batteries of random
voltages to the terminals of the electronic devices. The affected
circuitry amplifies these DC levels resulting in their saturation
and inability to function. The same applies to digital circuitry as
well, because digital circuits are essentially high gain, high
bandwidth analog circuits spending most of their lives in saturated
on or off states. During the short times, i.e., transitions, when
they change from one state to another, they operate as normal
analog circuits and are just as sensitive to unwanted DC levels. An
additional effect of introduction of extra DC pulses and levels,
due to modulation of the jamming signals, to the inputs of the
circuits is their failure to function as per their designed logic
flow. For example, logic gates, such as AND, OR, XOR, and their
inverses, control the operation of all digital functions of a
digital system. If any of their inputs is compromised with
additional unexpected logic levels or pulses, the circuits will
execute their function in accordance with their logic design,
resulting in illogical or chaotic operation. Also, today's digital
processors operate at gigahertz speeds and can actually process
individual cycles of microwave signals as pulses if they appear at
their inputs or within them, thus causing the same chaotic
operation.
[0007] Today's terrorists employ modern electronics to construct
bombs of various types to attack troops, non-combatants, government
officials, and the like for personal or political purposes. These
weapons are extremely difficult to deal with because they are
usually well hidden and are remotely or automatically activated.
The terrorists have at their disposal a myriad of electronic
devices designed for peaceful purposes, such as cell phones,
wireless phones, remote-controlled toys, pagers, handy-talkies,
remote-controlled garage door openers, digital clocks, wireless
door bells, infra red/microwave motion detectors, and the like,
which are easily modifiable into improvised bomb triggers.
[0008] Conventional radio jammers have shown considerable success
against wireless-based devices, but are ineffective against
non-wireless devices. Another serious disadvantage of these
conventional jammers is that the operating frequencies of the
improvised bomb triggers are unknown, thus requiring the jammers to
transmit on the entire radio spectrum to guarantee coverage.
Because the jammers necessarily spread their power across the radio
spectrum, jamming power per channel is inherently low. High power
transmitters are required to insure ample jamming power on every
channel. Furthermore, conventional jammer signals travel over great
distances and can jam friendly radio communications as well.
[0009] Thus, their exists a need for a new type of jammer: [0010]
That targets the semiconductor-based circuitry common in all modern
electronic devices, regardless of their nature, such as wireless,
infrared, analog and digital circuitry, and the like. [0011] That
utilizes microwave techniques. [0012] That operates over a
relatively short range of a few hundred feet. [0013] That disables
the functioning of all types or electronic circuits. [0014] That
does not interfere with untargeted friendly electronic devices.
[0015] Whose microwave signals are modulated to further enhance the
jamming function. [0016] That permanently damages/destroys targeted
electronic devices by adjusting its beam pattern. [0017] That
explodes even the simplest, and most difficult to defeat,
electrically wired fire bombs from a safe distance.
[0018] Numerous innovations for jammers have been provided in the
prior art, which will be described below in chronological order to
show advancement in the art, and which are incorporated herein by
reference thereto. Even though these innovations may be suitable
for the specific individual purposes to which they address,
however, they differ from the present invention in that they do not
teach a wireless microwave interferer for destructing, disabling,
or jamming a trigger of an improvised explosive device.
(1) U.S. Pat. No. 5,200,753 to Janusas.
[0019] U.S. Pat. No. 5,200,753 issued to Janusas on Apr. 6, 1993 in
class 342 and subclass 14 teaches a first-extended, interactive
amplifier operating at a fixed frequency, while a second similar
amplifier sweeps across a frequency range. The respective extended,
interactive amplifiers produce individual signals that are fed
through separate waveguides to corresponding horns of an antenna.
The frequency separation of the produced frequencies is made to
match a threat radar's IF channels. By setting the jamming signal
frequencies well above the threat radar band, the mixers of the
threat radar receiver generate grossly unbalanced angle error
signals. This disturbs the capability of the threat from homing in
on the jamming site. Thus, the resulting jamming signal provides
excellent electronic countermeasures.
(2) U.S. Pat. No. 5,777,572 to Janusas.
[0020] U.S. Pat. No. 5,777,572 issued to Janusas on Jul. 7, 1998 in
class 342 and subclass 13 teaches a device for damaging electronic
equipment, which has a millimeter wave generator, such as a
gyrotron oscillator, for producing very high power millimeter
waves. A beam-former antenna forms the millimeter waves into narrow
beams for distance transmission. An antenna coupled to the gyrotron
directs narrow beams of the millimeter waves to selected targets,
whereby the beams damage electronic equipment at the targets. The
millimeter wave generator produces frequencies ranging from about
100 to 140 GHz at 20 millisecond megawatt pulses at 400 kilowatts
CW.
[0021] It is apparent that numerous innovations for jammers have
been provided in the prior art, which are adapted to be used.
Furthermore, even though these innovations may be suitable for the
specific individual purposes to which they address, however, they
would not be suitable for the purposes of the embodiments of the
present invention as heretofore described, namely, a wireless
microwave interferer for destructing, disabling, or jamming a
trigger of an improvised explosive device.
3. SUMMARY OF THE INVENTION
[0022] Thus, an object of the embodiments of the present invention
is to provide a wireless microwave interferer for destructing,
disabling, or jamming a trigger of an improvised explosive device,
which avoids the disadvantages of the prior art.
[0023] Briefly stated, another object of the embodiments of the
present invention is to provide a wireless microwave interferer for
destructing, disabling, or jamming a trigger of an improvised
explosive device. The interferer includes a power source interface,
a control and monitoring panel, a waveform generator, a modulated
HV power supply, at least one microwave generator, a waveguide to
co-ax transformer and combiner, one of an ellipsoidal antenna and a
spiral antenna, and an antenna adjustment mechanism. The power
source interface interfaces with a power source. The waveform
generator is connected to the modulated HV power supply and to the
control and monitoring panel. The control and monitoring panel is
connected to the power source interface, the modulated HV power
supply, and the antenna adjustment mechanism. The modulated HV
power supply is connected to the at least one microwave generator.
The at least one microwave generator is connected to the waveguide
to co-ax transformer and combiner. The waveguide to co-ax
transformer and combiner is connected to the one of the ellipsoidal
antenna and the spiral antenna. The one of the ellipsoidal antenna
and the spiral antenna is connected to the antenna adjustment
mechanism.
[0024] The novel features considered characteristic of the
embodiments of the present invention are set forth in the appended
claims. The embodiments of the present invention themselves,
however, both as to their construction and their method of
operation together with additional objects and advantages thereof
will be best understood from the following description of the
specific embodiments when read and understood in connection with
the accompanying drawing.
4. BRIEF DESCRIPTION OF THE DRAWING
[0025] The figures of the drawing are briefly described as
follows:
[0026] FIG. 1 is a diagrammatic view of the wireless microwave
interferer of the embodiments of the present invention destructing,
disabling, or jamming a trigger of an improvised explosive
device;
[0027] FIG. 2 is a diagrammatic block diagram of the area generally
enclosed by the dotted curve identified by ARROW 2 in FIG. 1 of the
wireless microwave interferer of the embodiments of the present
invention;
[0028] FIG. 3A is a diagrammatic representation of the point of
convergence of microwave energy at the second focus of the
ellipsoidal antenna; and
[0029] FIG. 3B is a graph of beam density versus distance from
antenna comparing an average parabolic antenna with the ellipsoidal
antenna of the wireless microwave interferer of the embodiments of
the present invention.
5. LIST OF REFERENCE NUMERALS UTILIZED IN THE DRAWING
A. General.
[0030] 10 wireless microwave interferer of embodiments of present
invention for destructing, disabling, or jamming a trigger 12 of an
improvised explosive device 14 [0031] 12 trigger of improvised
explosive device 14 [0032] 14 improvised explosive device B.
Specific configuration of wireless microwave interferer 10. [0033]
16 power source interface [0034] 18 control and monitoring panel
[0035] 20 waveform generator [0036] 22 modulated HV power supply
[0037] 24 at least one microwave generator [0038] 26 waveguide to
co-ax transformer and combiner [0039] 28 ellipsoidal antenna [0040]
30 antenna adjustment mechanism [0041] 32 power source
C. Illustration.
[0041] [0042] 34 point of convergence [0043] 36 small array of
spiral antennas
6. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
A. The Principles of Operation
[0044] All active semiconductor devices are composed of basic
building blocks that in their most basic form are diodes. For
example, a simple transistor can be thought as of being an integral
combination of two diodes.
[0045] Even the most modern and complex integrated circuits
("ICs"), such as processors, memories, digital, analog, and all
other types of ICs, are integrated combinations of transistors, and
hence, are ultimately made up of diodes.
[0046] It is well known that the primary function of diodes is
rectification, i.e., changing AC current into DC current. The
embodiments of the present invention utilize this property by
introducing microwave signals into semiconductor circuits, which
forces the diodes to generate unwanted internal DC voltages
throughout, which upsets or stops their proper functioning.
[0047] Examination of electronic PCBs found in typical electronic
devices reveals that the lengths of interconnecting lands and
wiring range between about 0.5 and 10 centimeters, with about 30%
of them being in the range of 2 to 5 centimeters. This indicates
that in order to utilize the lands and wiring as quarter wave
antennas to maximize the capture of incident jamming microwave
radiation, the wavelength of the jamming signal should be of the
order of 12 centimeters or a frequency of 2.5 GHz. This is a
fortuitous result because the desired frequency falls on the edge
of the Industrial, Scientific, and Medical ("ISM") band for which
the technology of generating high power microwave devices is well
developed, available on off-the-shelf basis, and is expensive. The
most common and useful high power devices are CW magnetrons used in
industrial processing heating apparatus, commercial, and consumer
applications, such as microwave ovens. The output power levels of
the available CW magnetrons range from about 500 watts to tens of
kilowatts.
[0048] Another important aspect of the use of a 12 centimeter
wavelength is that maximum manufacturing tolerances of the antenna
and other related components are of the order of 1/30 of a
wavelength or 0.4 cm, thus making manufacturing relatively
inexpensive.
B. General
[0049] Referring now to the figures, in which like numerals
indicate like parts, and particularly to FIG. 1, which is a
diagrammatic view of the wireless microwave interferer of the
embodiments of the present invention destructing, disabling, or
jamming a trigger of an improvised explosive device, the wireless
microwave interferer of the embodiments of the present invention is
shown generally at 10 for destructing, disabling, or jamming a
trigger 12 of an improvised explosive device 14.
[0050] The wireless interfere 10 is designed to disable all
commercially available electronic devices that can be used by
terrorists as improvised triggers for explosive devices. The key
feature of the design is that its emissions interact with, and
directly adversely affect, the basic functioning of semiconductor
devices regardless of the type of circuitry in which they are
employed, be it radio, ultrasonic, infra-red, analog or digital,
and any combination thereof. The emissions from the wireless
microwave interferer 10 are in a form of a beam, and affects
electronics only within the beam.
[0051] The wireless microwave interferer 10 may be installed on
land vehicles traveling in improvised explosive devices
("IEDs")-prone environments. This being the case, it seems that
suppression of IEDs should be mostly in the direction of motion and
the sides of the vehicle. There are many other platforms where the
wireless microwave interferer 10 can be installed, including
aircraft, and used as in offensive rather than defensive
operations.
[0052] Offensive operations may be in the form of flying
helicopters equipped with higher power wireless microwave
interferers 10 over terrorist areas, and exploding their own IEDs
in their encampments.
[0053] The wireless microwave interferer 10 is designed to generate
a high power 2.46 GHz adjustable-geometry, modulated, microwave
beam used to illuminate suspect areas where
electronically-activated IEDs might be hidden for the purpose of
disabling, neutralizing, or safely exploding them from a safe
distance.
C. The Specific Configuration of the Wireless Microwave Interferer
10
[0054] The specific configuration of the wireless microwave
interferer 10 can best be seen in FIG. 2, which is a diagrammatic
block diagram of the area generally enclosed by the dotted curve
identified by ARROW 2 in FIG. 1 of the wireless microwave
interferer of the embodiments of the present invention, and a such,
will be discussed with reference thereto.
[0055] The wireless microwave interferer 10 comprises a power
source interface 16, a control and monitoring panel 18, a waveform
generator 20, a modulated HV power supply 22, at least one
microwave generator 24, a waveguide to co-ax transformer and
combiner 26, an ellipsoidal antenna 28, and an antenna adjustment
mechanism 30.
[0056] The power source interface 16 interfaces with a power source
31. The waveform generator 20 is connected to the modulated HV
power supply 22 and to the control and monitoring panel 18. The
control and monitoring panel 18 is connected to the power source
interface 16, the modulated HV power supply 22, and the antenna
adjustment mechanism 30. The modulated HV power supply 22 is
connected to the at least one microwave generator 24. The at least
one microwave generator 24 is connected to the waveguide to co-ax
transformer and combiner 26. The waveguide to co-ax transformer and
combiner 26 is connected to the ellipsoidal antenna 28. The
ellipsoidal antenna 28 is connected to the antenna adjustment
mechanism 30.
(1) The Power Source 31.
[0057] The power source 31 is the primary power source to power the
wireless microwave interferer 10, is capable of delivering reliably
several kilowatts, and is one of: [0058] Standard house current
(120/240 VAC 50/60 Hz). [0059] Military/aviation power (120/240 VAC
400 Hz). [0060] Automotive 12/24 VDC with inverter to convert the
DC to one of the above.
(2) The Control and Monitoring Panel 18.
[0061] The control and monitoring panel 18 contains all necessary
controls and indicators to effectively operate the wireless
microwave interferer 10, controls the wave form generator 20, the
modulated HV power supply 22, and the antenna adjustment mechanism
30, and displays status of primary power, system operational
voltages and currents, and other system settings.
(3) The Wave Form Generator 20.
[0062] The wave form generator 20 generates a number of different
selectable waveforms tailored to have maximum effectiveness on
different classes of targets.
(4) The Modulated HV Power Supply 22.
[0063] The modulated HV power supply 22 provides all necessary
voltages and signals for the wireless microwave interferer 10. Low
voltages feed the wave form generator 20, filaments of high power
RF devices (magnetrons), the antenna adjustment mechanism 30, and
performance indicators. The High Voltage/High Power section of the
power supply 31 responds to signals from the at least one microwave
generator 24, and converts them into high power signals that feed
the high power RF devices (magnetrons).
(5) The at Least One Microwave Power Generator 24.
[0064] The at least one microwave power generator 24 is a magnetron
that converts high power modulated signals from the modulated HV
power supply 22 into high power, modulated, microwave jamming
signals. When only one magnetron is activated, the jamming mode is
rectification. When two magnetrons are activated simultaneously,
the two modes of jamming are active, rectification, and spectrum
generation. The magnetron 24 operates at a high-duty cycle, and is
cooled by a cooling system.
(6) The Waveguide to Co-Ax Transformer and Combiner 26.
[0065] The waveguide to co-ax transformer and combiner 26 combines
the High Power Microwave signals from the two magnetrons, converts
their output into a single co-axial mode output port, and is much
simpler to implement mechanically than a less lossy waveguide-based
network. Run lengths involved, however, are short and losses are
tolerable.
(7) The Ellipsoidal Antenna 28.
[0066] The ellipsoidal antenna 28 directs microwave signals against
the improvised explosive device 14 that is to be one of disabled,
jammed, and damaged, and is a dish-type antenna having an
ellipsoidal rather than paraboloid surface contour. From analytic
geometry, ellipsoids have 2 foci meaning that if microwave energy
is introduced at one focal point, all of the energy is reflected
from the antenna surface and passes through the second focal point,
thus generating a "hot spot" a distance away from the first focal
point. Furthermore, by varying distance between primary radiator
and the ellipsoidal antenna 28, the "hot spot" is moved about in
space as desired, and width of the antenna beam is varied as
well.
[0067] Since the wireless microwave interferer 10 is intended for
use at relatively short ranges, it is important to concentrate its
power in the beam over the short ranges. The ellipsoidal antenna 28
does exactly that.
D. An Illustration
[0068] FIG. 3A, which is a diagrammatic representation of the point
of convergence of microwave energy at the second focus of the
ellipsoidal antenna, shows the point of convergence 34 of microwave
energy at the second focus of the ellipsoidal antenna 28. As the
range increases, the cross sectional area of the beam decreases to
the point of convergence 34. And, since all of the energy remains
within the beam, by necessity, the energy density increases up to
the point of convergence 34..sup.1 At the point of convergence 34,
the energy density is at maximum. Beyond the point of convergence
34, the beam diverges and the energy density decreases..sup.2
.sup.1By virtue of the square law..sup.2By virtue of the inverse
square law.
[0069] FIG. 3B, which is a graph of beam density versus distance
from antenna comparing an average parabolic antenna with the
ellipsoidal antenna of the wireless microwave interferer of the
embodiments of the present invention, shows the power density as
CURVE A of an average parabolic dish antenna. As noted, the power
density is in continual decline as the range decreases. The
performance of the ellipsoidal antenna as CURVE E shows the power
density first increasing with range up to a maximum at the point of
convergence 34 and then decreases thereafter. Clearly, at short
ranges, the ellipsoidal antenna produces a much more intense field
than a paraboloidal antenna.
E. A Small Array of Spiral Antennas 36
[0070] Because of their compactness and ease of manufacture, a
small array of spiral antennas 36 (FIG. 2) can be configured to
duplicate the function of the ellipsoidal antenna 28. This type of
an array would be particularly useful in airborne applications.
F. An Example
[0071] For demonstrating the operation of the embodiments of the
present invention, 2.45 GHz, one kilowatt magnetrons were selected.
It was also demonstrated that the wireless microwave interferer 10
did not interfere with communications not exposed to the beam.
[0072] A random collection of typical devices are exposed to the
disabling beam for demonstrating the effectiveness of the wireless
microwave interferer 10. The devices include:
(1) Non-Radio Based Devices.
[0073] IR motion detectors. [0074] Digital clocks. [0075] Electric
eyes. [0076] Cassette tape recorders. [0077] Simulated blasting
caps. [0078] Laptop computers.
(2) Radio-Based Devices.
[0078] [0079] CB radio transceivers (27 MHz). [0080]
Radio-controlled toys (27 MHz). [0081] Garage door opener receivers
(300 MHz). [0082] Model aircraft radio-controlled receivers (75
MHz). [0083] Cordless phones (49, 900, & 2400 MHz). [0084] Cell
phones (800 & 1800 MHz). [0085] GPS receivers (1575 MHz).
[0086] Police-band hand-held radios (470 MHz). [0087] Fire
department-band hand-held radios (170 MHz). [0088] Marine-band
hand-held radios (160 MHz). [0089] Marine-band base stations (160
MHz). [0090] Ham radios (2 meter) hand-held (144 MHz). [0091] AM-FM
radios (1 MHz & 88-108 MHz). [0092] Microwave motion detectors
(10.5 GHZ).
G. The Conclusions
[0093] It will be understood that each of the elements described
above or two or more together may also find a useful application in
other types of constructions differing from the types described
above.
[0094] While the embodiments of the present invention have been
illustrated and described as embodied in a wireless microwave
interferer for destructing, disabling, or jamming a trigger of an
improvised explosive device, however, they are not limited to the
details shown, since it will be understood that various omissions,
modifications, substitutions, and changes in the forms and details
of the embodiments of the present invention illustrated and their
operation can be made by those skilled in the art without departing
in any way from the spirit of the embodiments of the present
invention.
[0095] Without further analysis the foregoing will so fully reveal
the gist of the embodiments of the present invention that others
can by applying current knowledge readily adapt them for various
applications without omitting features that from the standpoint of
prior art fairly constitute characteristics of the generic or
specific aspects of the embodiments of the present invention.
* * * * *