TW503627B - Radio wave telecommunication signal jamming device - Google Patents

Abstract

The present invention relates to a device for jamming the downlink channels of CDMA or GSM by generating a broadband signal which is electromagnetic energy uniformly distributed over the band of 20 to 30 MHz with a sharp roll-off characteristic and a flat power distribution.

Description

503627, fJt 9Qll62〇i 5. Description of the invention (1)

★ Edge distance communication signal 孓 > The present invention relates to ^ line characteristics and good performance: especially to the use of triangular waves to achieve good < Due to long-distance communication technology, the use of fast f t ^ (::: 甬 $ long-distance communication devices such as cellular telephones, _, ^ § systems), satellite mobile communication devices, and call states is very common. However, the use of these mobile communication devices will interfere with others, especially in quiet places such as churches, concert halls, theaters, courts, schools, etc., where: in places such as hospitals or on airplanes, the use of mobile communication devices will be dry After two, he slapped his communication device and had serious consequences. Recognizing this problem, many methods have been proposed for the use of wire radio communication devices in public places, one of which is -i method and equipment for limiting radio wave communication signals "(Korean Patent Publication No. 00-3 1 047 ), Which generates noise power via a noise-producing and scattered signal generator), and uses = I, for example, long-distance communication over broadband lines. The other method is that, 钲 a specific location interferes with National Patent Publication No. 2000- ^ Electric wave blocking device "(Korean = frequency = range of Satoshi signal to limit ^ magic, # to generate coverage. Also-the method is, the blind zone generates crying" j ', factory: the receiving and sending of attack signals Ung ~ l 1-5 ...: (Japanese Patent Publication No. py 〇 No load ○ Opening device and generating a radio frequency communication with a frequency generating filter having a wide-ranging sound generating number including a written word on and off

^ 4 pages of wave waver and automatic line; letter of frequency range 503627 _ case number 90116204 _ year month __ V. Description of the invention (2) Restriction system "(Japanese Patent Publication No. py ο ία ng — 1 0 — 1 7 4 1 6 5). However, there are still many unresolved issues. When the frequency range of the interference signal changes with environmental conditions, or the signal is generated outside the desired frequency band, the interference signal will affect other services or other electronics. Furthermore, an easy-to-manufacture and low-cost communication signal interference device has not been developed. SUMMARY OF THE INVENTION An object of the present invention is to provide a long-distance communication signal interference device that generates a broadband interference signal to a signal received by a mobile phone. Another object of the present invention is to provide a long-distance communication signal interference device that does not affect services outside the frequency range of a mobile phone. Another object of the present invention is to provide a long-distance communication signal interference device with a flat-top frequency distribution. Another object of the present invention is to provide a long-distance communication signal interference device with competitive cost and function. Purpose, the long-distance communication signal interference device of the present invention includes a broadband signal generator that generates a broadband frequency modulation (FM) signal that covers the full frequency band of the downlink signal, a frequency stabilizer that stabilizes the frequency generated by the broadband signal generator, and A power amplifier that amplifies a broadband F M signal stabilized by a frequency stabilizer and matches it with an antenna to transmit air signals through the antenna, and a power source that provides power to individual lines. Further, the long-distance communication signal interference device of the present invention The broadband signal generator includes a triangle wave generator, an FM modulator that generates a wideband signal by using the triangle wave generated by the triangle wave generator, and a high-frequency power amplifier that amplifies the output signal of the FM modulator.

Page 5 503627 _Case No. 90116204_Year Month and Day_ || i_ V. Description of the Invention (3) Schematic Introduction Figures 1 a and 1 b are schematic diagrams of uplink and downlink signals and interference. Figure 2 is a graph of interference signal characteristics. Fig. 3 is a schematic block diagram showing the structure of a long-distance communication signal interference device of the present invention. FIG. 4 is a circuit diagram of an embodiment of a triangle wave generator. FIG. 5 is a circuit diagram of an embodiment of a broadband FM signal modulator. Figure 6 shows the frequency drift effect of the interference signal. FIG. 7 is a circuit diagram of a conventional embodiment of power amplification. FIG. 8 is a frequency distribution diagram of a signal generated by a broadband signal generator of the present invention. FIG. 9 is a spectrum distribution diagram of an output signal of a communication interference device according to the present invention. BEST MODE FOR CARRYING OUT THE INVENTION The structure and operation of the radio wave long-distance communication signal interference device of the present invention will be described below with reference to the drawings. Figures 1a and 1b show the downlink and interfering signal frequency bands and interception. Downlink interference is used because it requires high power and affects the operation of the base station. Cellular phone signals have 20 channels with a bandwidth of 1.23MHz in the frequency range of 8 6 9 ~ 8 9 4 MHz (PCS signals have 21 channels with a bandwidth of 1.25MHz in the frequency range of 1 840 ~ 1 8 70MHz) . When on the chain, the frequency range used by the cellular phone is 8 2 4 ~ 8 4 9MHz, while the frequency range used by PCS is 1750 ~ 1780MHz. In order to interfere with the communication signal, the interference signal whose power is greater than the downlink signal received by the mobile phone must be transmitted in the full channel range. The base station signal should be connected to the base station

503627

Years ^^ Amendment V. Invention Description (4) The mobile phone receives, and the communication signal interference device generates an interference signal to disturb the signal from the station to the mobile phone. Interfering signals that interrupt communication signals 虮 f s affect services other than mobile phone communication, such as the operation of medical equipment in hospitals, which should be protected from other signals. —Pattern 2 shows the signal spectrum, showing the effect of the unstable signal frequency ^ 6. When moving from a frequency band with interference signals to a non-interference signal, the degradation characteristics are improved, and there is no interference signal in a small frequency band. Two σ Second, the performance is improved, and the communication interception characteristics in each channel become uniform. 'The flatness of the signal represents how the interference signal radio wave energy is evenly distributed in the interception band. When the interference signal radio wave energy is not evenly distributed, each channel The interference characteristics will be different. In addition, when generating a broadband F M signal, the box f must generate spurious signals that will affect other services. The spurious signals are undesired signals outside the scope of the organization. The system must be designed to avoid spurious signals 'U' because of the spurious signals. Will interfere with other services. As shown in the figure is a schematic block diagram of the structure of a communication signal jamming device, one wide of the signal; = soil ff: the broadband signal FM produced by the full-band broadband F M of the chain signal generates a benefit of 10, and the broadband signal generator of 1 Wide Kί: A frequency stabilizer 20 of 疋 will be determined by frequency stabilizer 2 〇 稃 ▼ ▼ Μ signal is amplified and will be in the air. U t 疋 antenna 5 〇 transmits a power ^ ^; ◦ matching and through the signal generator in_ 镅 π 〇 is 3 〇, and provides power to the wide-path power supply 4;) 〇, know frequency " 2 〇, and the line utilization of the power amplifier 30 :: i ί ί life generator 10 includes a triangle wave generator 11 and-triangle wave generator 11 generated by the angular wave generator-Broadband ii 50362 / V. Description of the invention (5) A band signal modulator, a range of 丄 2 and covering the fixed output signal frequency band of the mobile phone, while the triangle wave generator 1 i details ^ The above i includes an unstable multiharmonic pirate including several resistors; the capacitor (C 1, C 2; The push-pull circuit includes a transistor (Q 3 which can be connected to each transistor). The other instability bands L · instability band F Z are shown, which are based on the example of the M s cycle system, i Varactor diodes, 彳 /, Γ R 8, R 9), number and one transistor (Q 5 has a ribbon signal generator 1): When operating, the signal generated by two must be used. Effect; it will interfere with other services-about the frequency stabilizer 2 〇, =, the feedback program is Li Sui Tong After a frequency divider 2 = ,, ·· 'to generate a frequency circuit diagram of the full-band angular wave of the chain, the ring-resonator and (R 1,), and the various base extremes' Q 4 One R 2 receives several distribution numbers. As shown in the three fixed recovery, the 5 R 3 transistor is replaced with a multi-resistor, a capacitor, or a timer, and a triangular wave is generated to generate a wide variable including one inductor (L capacitors).

C

Resistor, several 4, C

Affects the rate of its angular waves. Figure Triangle wave path, no, R 4 (Q 1 oscillator (R 5 C C 3 I C S with signal (v R resistor 5, C

Other frequencies and amplitudes are determined by the three generators (stable multi-harmonic), number, and the letter from Q 2 ′ R 6). This replaces. One wide),-(R 〇 will be affected by environmental changes, so it will not be affected by environmental changes: it will affect other services, Figure 6 shows that the frequency of the interference signal is above the required frequency band Or even if there is a non-interfering channel, Γ is the generation of a stable frequency, as shown in Figure 7 ^ The wideband FM modulator 12 The output frequency is used as a bandwidth pass filter 22 and a frequency ratio ^

503627 _Case No. 90116204_ Year Month Date__ V. Description of the Invention (6) The device 2 3 and a low-pass filter 24 are completed, and the frequency stabilizer 20 is provided with a stable frequency system by a quartz oscillator. The signal (V 2) is added to the output signal (V 1) of the triangular wave generator 11 and supplied to the input terminal of the wideband FM modulator 12. The power amplifier 30 will amplify the power of the wideband signal stabilized by the frequency stabilizer and send this signal to the antenna. Its structure is shown in Figure 8. The stabilized frequency is guided to the high-frequency power amplification transistor (Q 6), and the amplified frequency is sent to the antenna connected to the collector 50. The impedance matching is important here. If the impedance is not matched, the amplifier may be overloaded. At this time, the amplifier may be damaged and the signal power cannot be transmitted through the antenna. If the amplifier 30 is non-linear, there may be harmonics that may interfere with services outside the interference band, thus limiting the use of interference devices. Therefore, in the present application, the device is designed to amplify the linear characteristics of the power amplifier and limit its power. harmonic. The frequency distribution of the output signal of the communication interference device of the present invention is as shown in FIG. 9, which is a nearly ideal roll-off characteristic and has a flat top distribution. However, in order to obtain this frequency distribution, compared with the broadband FM signal modulator 1 2 The output of each output frequency is preferably fixed first. As described above, the communication interference device of the present invention provides a good roll-off characteristic, flat-top frequency distribution, frequency stability, and cost and power competition compared with other products by using a triangle wave generator and wideband FM modulation. Sex.

Although the present invention has been described with reference to a specific embodiment based on the Korean standard frequency band, please understand that the present invention can be applied to other systems in other countries, such as Taiwan's uplink frequency range of 8 9 0 ~ 9 1 5 Μ ζ ζ GS

503627

Page ίο Description of invention (8) 0 0

0 4 05 0 m Chinese Wideband Signal Generator Diagonal Wave Generation Wideband Signal Modulator Frequency Stabilizer Frequency Divider Bandwidth Pass Filter Frequency Comparator Low Pass Filter Power Amplifier Power Antenna List English Broad signal generator triangular wave generator broad band signal modulator frequency stabilizer frequency divider bandwith pass filter frequency comparator low pass filter power amplifier power supply antenna

Page 11 503627 1_Case No. 90116204_Year Month and Day_ Brief description of the diagram ’Page 12

Claims (1)

503627: _Case No. 90116204_ Year Month__ VI. Patent Application Range 1 · A radio wave long-distance communication signal interference device, which uses an interference signal to cover a fixed area of the mobile phone's downlink frequency band and interfere with the phone. The device Including: (a) a broadband signal generator that generates a broadband F M signal covering the full frequency band of the downlink; (b) a frequency stabilizer that stabilizes the frequency of the F M signal output by the broadband signal generator; (c ) A power amplifier that amplifies the broadband F M signal stabilized by the frequency stabilizer and matches it with the antenna to transmit the air signal via the antenna; and (d) a power source that provides power to individual lines. 2 · Radio wave long-distance communication signal interference device according to item 1 of the scope of patent application, wherein the wideband signal generator includes: (a) a triangular wave generator; and (b) a wideband FM signal modulator, based on The frequency of the triangle wave voltage generated by the triangle wave generator. Page 13