CN103684515A - Handheld-type dual-frequency-band ultrashort wave air radio station - Google Patents
Handheld-type dual-frequency-band ultrashort wave air radio station Download PDFInfo
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- CN103684515A CN103684515A CN201310625406.4A CN201310625406A CN103684515A CN 103684515 A CN103684515 A CN 103684515A CN 201310625406 A CN201310625406 A CN 201310625406A CN 103684515 A CN103684515 A CN 103684515A
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Abstract
The invention discloses a handheld-type dual-frequency-band ultrashort wave air radio station which comprises a radio frequency unit, a receiving unit, an audio unit, a display control unit, a CPU (central processing unit) and a power source. The radio frequency unit, the receiving unit and the audio unit are sequentially connected, the radio frequency unit, the receiving unit, the audio unit and the display control unit are all connected with the CPU and the power source, the CPU is connected with the power source, the radio frequency unit comprises a directional coupler, a transceiving switch, a first U/V switch, a U-band filter and a V-band filter, a second U/V switch, the directional coupler, the transceiving switch and the first U/V switch are sequentially connected, the first U/V switch is connected with the second U/V switch through the U-band filter, the first U/V switch is connected with the second U/V switch through the V-band filter, and the second U/V switch is connected with the receiving unit. Frequency band of a receiver is expanded to be 108-173.975MHz and 225-399.975MHz, so that receiving frequency band is greatly expanded; after a frequency synthesizing unit is added, the radio station is supportive of FM (frequency modulation) voices.
Description
Technical field
The present invention relates to Ultra-short Wave Communication Technique field, be specifically related to hand-hold type two-band ultrashort wave ground to air radio set.
Background technology
Ultrashort wave frequency band hand-hold type ground to air radio set, typically refers to the hand-hold type radio station with earthwave or space wave line-of-sight transmission, and it is mainly partly comprised of transceiver, antenna and power supply etc.It is mainly used in department's private communication command dispatching systems such as civil aviaton, railway, public security, flood control, fire prevention, especially for the field tasks such as airborne, air-drop, training and airport emergency guarantee etc., sky is guided to commander's task.
At present, the ultrashort wave frequency band hand-hold type ground to air radio set of domestic main employing is mainly that Japanese ICOM Chinese mugwort can be admired, U.S. Motorola, New Zealand are very lucky, Canada's innovation, the product of Japan's day essence and Kenwood, and these equipment can better meet daily earth-space communication.
The principle of microwave or radio communication is that the signal that signal is modulated into certain wave band at transmitting terminal is launched, and at receiving terminal, the signal receiving is carried out to demodulation, and then reduction original signal.
Needs based on home communications environment but, these products exist operating frequency support to lack, the problem that mode of operation is single, specifically, the working frequency range of these products is 118MHz～136.975MHz VHF of civil aviaton voice grade substantially, cannot realize the communication work in frequency range 108MHz～173.975MHz and two frequency ranges of 225～399.975MHz; These products be take AM speech as mode of operation, and FM speech is not supported; These products only have the channel spacing of 25kHz, lack 8.33kHz channel spacing; These products only have this kind of lifesaving frequency of 121.5MHz, lack 243MHz lifesaving frequency.
Summary of the invention
In order to overcome prior art when communicating by ultrashort wave frequency band hand-hold type ground to air radio set, existing imported product exists operating frequency support to lack, and the technical problem that mode of operation is single, the invention provides hand-hold type two-band ultrashort wave ground to air radio set.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
Hand-hold type two-band ultrashort wave ground to air radio set, comprise radio frequency unit, receiving element, audio unit, aobvious control unit, CPU processor, power supply, radio frequency unit, receiving element, audio unit connect in turn, radio frequency unit, receiving element, audio unit, aobvious control unit all connect CPU processor and power supply, and CPU processor connects power supply; Radio frequency unit comprises directional coupler, transmit-receive switch, a U/V switch, U section filter, V section filter, the 2nd U/V switch, directional coupler, transmit-receive switch, a U/V switch connect in turn, the one U/V switch connects the 2nd U/V switch by U section filter, the one U/V switch is by connection the 2nd U/V switch of V section filter, and the 2nd U/V switch connects receiving element.
Operation principle of the present invention is, by transmit-receive switch, come the reception of processing signals and the conversion of emission state, by a U/V switch, judge the wave band of signal, to the signal of U section frequency range, adopt U section filter to carry out filtering, the unexpected signal of filtering U section frequency range, guarantee the pure property of signal, to the signal of V section frequency range, adopt V section filter to carry out filtering, the unexpected signal of filtering V section frequency range, guarantee the pure property of signal, by the 2nd U/V switch, to filtered signal, adopt corresponding pattern to enter receiving element and carry out signal processing, thereby realizing is 108MHz ~ 173.975MHz and two frequency ranges of 225 ~ 399.975MHz by the band spreading of receiver.
With prior art when communicating by ultrashort wave frequency band hand-hold type ground to air radio set, existing product is only supported 118MHz ~ 136.975MHz VHF of civil aviaton voice grade, the technical scheme that cannot receive the above voice grade signal of 136.975MHz is compared, the present invention is on the basis of existing technology by increasing by a U/V switch, the 2nd U/V switch and U section filter cooperatively interact to realize the signal of UHF section frequency range are received, adopt a U/V switch, the 2nd U/V switch, U section filter, the technical scheme of the technical scheme of V section filter and simple V section filter has been compared substantial difference, the present invention has greatly expanded reception frequency range, produced positive effect, obtained substantial progress.
For further optimization, improve the signal gain ability of radio frequency unit, as preferably, radio frequency unit also comprises ALC automatic electric-level gain regulating circuit, and ALC automatic electric-level gain regulating circuit is to be connected to form in turn ALC automatic electric-level gain regulating circuit by directional coupler, automatic level controller, gain controller, the 2nd U/V switch.
It is more than the further improvement to hand-hold type two-band ultrashort wave ground to air radio set signal gain ability.ALC automatic electric-level gain regulating circuit is for changing due to device itself, and environment causes changing operate-point etc., the circuit of the stable level adding in circuit, and the level of automatically correcting skew is got back to the numerical value of requirement.
For further optimization, improve the AM signal gain ability of radio frequency unit, as preferably, radio frequency unit also comprises AM amplitude modulation gain adjusting circuit, AM amplitude modulation gain adjusting circuit comprises AM amplitude modulator, gain controller, CPU processor is all connected with AM amplitude modulator with audio unit, and AM amplitude modulator connects gain controller, and gain controller connects the 2nd U/V switch.
It is more than the further improvement to hand-hold type two-band ultrashort wave ground to air radio set signal gain ability.AM amplitude modulation gain adjusting circuit is mainly said the simulated audio signal that exhalation frequency is lower, on AM amplitude modulator, carrier wave is carried out to amplitude modulation(PAM), makes it become the form that is suitable for transmission.
For further optimization, improve AM signal and receive the gain ability of signal, as preferably, radio frequency unit also comprises pre-amplifier and final amplifier, gain controller connects pre-amplifier, pre-amplifier and be connected final amplifier, final amplifier connection the 2nd U/V switch.
It is more than the further improvement to hand-hold type two-band ultrashort wave ground to air radio set signal gain ability.Pre-amplifier is by signal being carried out to the amplification of voltage level, and final amplifier carries out electric current amplification for the signal after prime is amplified, and is beneficial to send.
For further optimization, improve the disposal ability of FM signal, as preferably, hand-hold type two-band ultrashort wave ground to air radio set, also comprise that temperature compensating crystal oscillator device is all connected with an oscillator, two oscillators by temperature compensating crystal oscillator device, an oscillator, two comprehensive unit of frequency that oscillator forms, an oscillator connects the gain controller of radio frequency unit, two oscillators connect receiving element, frequently combine unit and are all connected with CPU processor with power supply.
It is more than the further improvement to the disposal ability of hand-hold type two-band ultrashort wave ground to air radio set FM signal.Temperature compensating crystal oscillator device is a kind of existing good frequency stability, the Microwave Frequency Source that has again good phases noise characteristic, it can provide stable frequency of oscillation for an oscillator and two oscillators, thereby utilize the filtering characteristic of the phase-locked loop of an oscillator and gain controller formation, the noise of filtered signal and obtain good signal, the phase-locked loop that two oscillators and receiving element form, utilizes the filtering characteristic of phase-locked loop, the noise of filtered signal and obtain good signal.
For further optimization, the signal that improves receiving element receives, disposal ability, as preferably, receiving element is connected to form in turn by low pass filter, high pass filter, high-frequency amplifier, the first frequency mixer, the first filtering intermediate frequency amplifying unit, the second frequency mixer, the second filtering intermediate frequency amplifying unit, three-mixer, the 3rd filtering intermediate frequency amplifying unit, demodulator, wherein the first frequency mixer is also connected with an oscillator frequently combining unit, and the second frequency mixer is also connected with two oscillators frequently combining unit.
It is more than the further improvement to the reception of hand-hold type two-band ultrashort wave ground to air radio set signal, disposal ability.Signal is carried out to low-pass filtering to receiving element and high-pass filtering obtains intermediate frequency output, again after High frequency amplification amplifies, have after the phase-locked and intermediate frequency of twice mixing amplifies, just can obtain the signal that frequency stability is higher, spectral purity is high, phase noise is lower and through mixing for the third time, filtering intermediate frequency amplifying signal, substantially reach requirement again, by demodulator, signal is carried out to demodulation output.
For further optimization, improve the signal handling capacity of receiving element, as preferably, receiving element also comprises level detector, crystal resonator, and level detector connects high-frequency amplifier, and crystal resonator connects three-mixer.
It is more than the further improvement to hand-hold type two-band ultrashort wave ground to air radio set signal handling capacity.Level detector connects high-frequency amplifier and can automatically regulate amplification quantity, crystal resonator to connect three-mixer to form Mixing PLL, the filtering ripple of making an uproar.
For further optimization, improve audio unit speech play and transmitting capacity, as preferably, audio unit comprises the first audio frequency amplifier, earphone speaker unit, microphone, the first audio frequency amplifier, the demodulator of receiving element connects the first audio frequency amplifier, the first audio frequency amplifier frames connecting with headphone loudspeaker unit, and earphone speaker unit also connects CPU processor, microphone connects the second audio frequency amplifier, and the second audio frequency amplifier connects the AM amplitude modulator of radio frequency unit.
It is more than the further improvement to hand-hold type two-band ultrashort wave ground to air radio set speech play and transmitting capacity.Demodulator connects the amplification that the first audio frequency amplifier is realized restituted signal, and then outputs to earphone speaker unit; Microphone connects the second audio frequency amplifier to be realized the amplification of voice signal and then sends to AM amplitude modulator and carry out amplitude modulation(PAM).
For further optimization, improve the operability of aobvious control unit, as preferably, show control unit and comprise keyboard and OLED display screen, keyboard is all connected with CPU processor with OLED display screen.
It is more than the further improvement to the operability of hand-hold type two-band ultrashort wave ground to air radio set.OLED display screen can intuitively show the input of audio signal, and OLED display screen has the feature of high brightness, high-contrast simultaneously, is conducive to use in lowered in field environment.Keyboard is mainly used to dial and shortcut function setting.
Compared with prior art, the invention has the beneficial effects as follows:
1. communicating by ultrashort wave frequency band hand-hold type ground to air radio set with prior art, adopt the technical scheme of imported product to compare, the present invention adopts a U/V switch, the 2nd U/V switch and U section filter to cooperatively interact to realize the signal of UHF section frequency range is received, by increasing the comprehensive unit of frequency being formed by temperature compensating crystal oscillator device, oscillator, two oscillators, realized the support to FMFM speech, made ultrashort wave frequency band hand-hold type ground to air radio set obtain the scope of application and expanded greatly.
2. the present invention is also by signal being carried out to the phase-locked filtering of repeatedly mixing, and intermediate frequency filtering amplifies, and supplies demodulator demodulation, thereby obtain high-quality voice signal thereby obtain the signal that frequency stability is higher, spectral purity is high, phase noise is lower.
The technology that the invention solves is when communicating by ultrashort wave frequency band hand-hold type ground to air radio set, exist operating frequency support to lack, the technical problem that mode of operation is single, it is 108MHz ~ 173.975MHz and two frequency ranges of 225 ~ 399.975MHz by the band spreading of receiver, greatly expand reception frequency range, added after frequently combining unit simultaneously and increased the support to FM speech, obtained positive effect, obtained the progress of essence, it has good industrial applicibility and industrial value.
Accompanying drawing explanation
In order to clearly demonstrate the present invention, adopt accompanying drawing to make an explanation to the present invention and embodiment below, and accompanying drawing is made to brief description.Accompanying drawing and accompanying drawing explanation are schematically, do not form concrete restriction of the present invention.Under inventive concept of the present invention is instructed, can also pass through accompanying drawing below, obtain other accompanying drawing.
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with Figure of description, the specific embodiment of the present invention is further illustrated.The explanation of these execution modes is mainly used in helping to understand inventive concept of the present invention, the technical problem solving, the technical characterictic that forms technical scheme and the technique effect bringing.To the explanation of these execution modes, be schematically, do not form concrete restriction of the present invention.The technical characterictic that each execution mode of the present invention is related, just can not combine mutually as long as do not form each other conflict, and by being equal to all embodiment alternative or that obviously variant obtains, and embodiments of the invention are identical in fact.
Embodiment mono-:
As shown in Figure 1, the present invention, comprise radio frequency unit, receiving element, audio unit, aobvious control unit, CPU processor, power supply, radio frequency unit, receiving element, audio unit connect in turn, radio frequency unit, receiving element, audio unit, aobvious control unit all connect CPU processor and power supply, and CPU processor connects power supply; Radio frequency unit comprises directional coupler, transmit-receive switch, a U/V switch, U section filter, V section filter, the 2nd U/V switch, directional coupler, transmit-receive switch, a U/V switch connect in turn, the one U/V switch connects the 2nd U/V switch by U section filter, the one U/V switch is by connection the 2nd U/V switch of V section filter, and the 2nd U/V switch connects receiving element.
When the present invention is come into operation, the first step, inspection, commissioning device: each assembly that checks radio frequency unit, whether directional coupler, transmit-receive switch, a U/V switch, U section filter, V section filter, the 2nd U/V switch connect and compose by technical scheme of the present invention, check whether radio frequency unit, receiving element, audio unit, aobvious control unit, CPU processor, power supply connect and compose by technical scheme of the present invention, whether normally connect, if there is extremely, corrected; Second step, adds electric test equipment: start power supply, confirm that whether hand-hold type two-band ultrashort wave ground to air radio set operating state is normal, just come into operation after normal; The 3rd step, carries out hand-hold type two-band ultrashort wave ground to air radio set communication operations, and antenna is connected with hand-hold type two-band ultrashort wave ground to air radio set, by hand-hold type two-band ultrashort wave ground to air radio set, communicates.
Those skilled in the art can freely select according to the requirement of practice of construction environment and workpiece the parameter of assembly.
Embodiment bis-:
In order to improve hand-hold type two-band ultrashort wave ground to air radio set signal gain ability, the present embodiment improves further on the basis of embodiment mono-, as shown in Figure 1, the radio frequency unit of the present embodiment also comprises ALC automatic electric-level gain regulating circuit, and ALC automatic electric-level gain regulating circuit is to be connected to form in turn ALC automatic electric-level gain regulating circuit by directional coupler, automatic level controller, gain controller, the 2nd U/V switch.
Embodiment tri-:
In order to improve hand-hold type two-band ultrashort wave ground to air radio set signal gain ability, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～bis-, as shown in Figure 1, the radio frequency unit of the present embodiment also comprises AM amplitude modulation gain adjusting circuit, AM amplitude modulation gain adjusting circuit comprises AM amplitude modulator, gain controller, CPU processor is all connected with AM amplitude modulator with audio unit, and AM amplitude modulator connects gain controller, and gain controller connects the 2nd U/V switch.
Embodiment tetra-:
In order to improve hand-hold type two-band ultrashort wave ground to air radio set signal gain ability, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～tri-, as shown in Figure 1, the radio frequency unit of the present embodiment also comprises pre-amplifier and final amplifier, gain controller connects pre-amplifier, pre-amplifier be connected final amplifier, final amplifier connects the 2nd U/V switch.
Embodiment five:
In order to improve the disposal ability of hand-hold type two-band ultrashort wave ground to air radio set FM signal, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～tetra-, as shown in Figure 1, the hand-hold type two-band ultrashort wave ground to air radio set of the present embodiment, also comprise by temperature compensating crystal oscillator device, an oscillator, two comprehensive unit of frequency that oscillator forms, temperature compensating crystal oscillator device all with an oscillator, two oscillators connect, an oscillator connects the gain controller of radio frequency unit, two oscillators connect receiving element, frequently combining unit is all connected with CPU processor with power supply.
Embodiment six:
In order to improve hand-hold type two-band ultrashort wave ground to air radio set signal, receive, disposal ability, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～five, as shown in Figure 1, the receiving element of the present embodiment is by low pass filter, high pass filter, high-frequency amplifier, the first frequency mixer, the first filtering intermediate frequency amplifying unit, the second frequency mixer, the second filtering intermediate frequency amplifying unit, three-mixer, the 3rd filtering intermediate frequency amplifying unit, demodulator is connected to form in turn, wherein the first frequency mixer is also connected with an oscillator frequently combining unit, the second frequency mixer is also connected with two oscillators frequently combining unit.
Embodiment seven:
In order to improve hand-hold type two-band ultrashort wave ground to air radio set signal handling capacity, the present embodiment improves further on the basis of embodiment six, as shown in Figure 1, the receiving element of the present embodiment also comprises level detector, crystal resonator, level detector connects high-frequency amplifier, and crystal resonator connects three-mixer.
Embodiment eight:
In order to improve hand-hold type two-band ultrashort wave ground to air radio set speech play and transmitting capacity, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～seven, as shown in Figure 1, the audio unit of the present embodiment comprises the first audio frequency amplifier, earphone speaker unit, microphone, the first audio frequency amplifier, the demodulator of receiving element connects the first audio frequency amplifier, the first audio frequency amplifier frames connecting with headphone loudspeaker unit, earphone speaker unit also connects CPU processor, microphone connects the second audio frequency amplifier, the second audio frequency amplifier connects the AM amplitude modulator of radio frequency unit.
Embodiment nine:
In order to improve the operability of hand-hold type two-band ultrashort wave ground to air radio set, the present embodiment improves further on the basis of any one embodiment of embodiment mono-～eight, as shown in Figure 1, the aobvious control unit of the present embodiment comprises keyboard and OLED display screen, and keyboard is all connected with CPU processor with OLED display screen.
Above combination Figure of description is made detailed description to embodiments of the present invention; but the present invention is not limited to the above-described embodiment and examples; on the basis based on inventive concept of the present invention; above-mentioned execution mode of the present invention is carried out to various variations, modification, replacement or modification, all fall into protection scope of the present invention.
Claims (9)
1. hand-hold type two-band ultrashort wave ground to air radio set, comprise radio frequency unit, receiving element, audio unit, aobvious control unit, CPU processor, power supply, described radio frequency unit, receiving element, audio unit connect in turn, described radio frequency unit, receiving element, audio unit, aobvious control unit all connect CPU processor and power supply, and described CPU processor connects power supply; It is characterized in that, described radio frequency unit comprises directional coupler, transmit-receive switch, a U/V switch, U section filter, V section filter, the 2nd U/V switch, described directional coupler, transmit-receive switch, a U/V switch connect in turn, the one U/V switch connects the 2nd U/V switch by U section filter, the one U/V switch is by connection the 2nd U/V switch of V section filter, and described the 2nd U/V switch connects receiving element.
2. hand-hold type two-band ultrashort wave ground to air radio set according to claim 1, it is characterized in that, described radio frequency unit also comprises ALC automatic electric-level gain regulating circuit, and described ALC automatic electric-level gain regulating circuit is to be connected to form in turn ALC automatic electric-level gain regulating circuit by directional coupler, automatic level controller, gain controller, the 2nd U/V switch.
3. hand-hold type two-band ultrashort wave ground to air radio set according to claim 1, it is characterized in that, described radio frequency unit also comprises AM amplitude modulation gain adjusting circuit, described AM amplitude modulation gain adjusting circuit comprises AM amplitude modulator, gain controller, CPU processor is all connected with AM amplitude modulator with audio unit, described AM amplitude modulator connects gain controller, and described gain controller connects the 2nd U/V switch.
4. hand-hold type two-band ultrashort wave ground to air radio set according to claim 1, it is characterized in that, described radio frequency unit also comprises pre-amplifier and final amplifier, gain controller connects pre-amplifier, described pre-amplifier be connected final amplifier, described final amplifier connects the 2nd U/V switch.
5. hand-hold type two-band ultrashort wave ground to air radio set according to claim 1, it is characterized in that, also comprise by temperature compensating crystal oscillator device, an oscillator, two comprehensive unit of frequency that oscillator forms, described temperature compensating crystal oscillator device is all connected with an oscillator, two oscillators, a described oscillator connects the gain controller of radio frequency unit, described two oscillators connect receiving element, and described frequency is combined unit and is all connected with CPU processor with power supply.
6. hand-hold type two-band ultrashort wave ground to air radio set according to claim 1, it is characterized in that, described receiving element is connected to form in turn by low pass filter, high pass filter, high-frequency amplifier, the first frequency mixer, the first filtering intermediate frequency amplifying unit, the second frequency mixer, the second filtering intermediate frequency amplifying unit, three-mixer, the 3rd filtering intermediate frequency amplifying unit, demodulator, wherein the first frequency mixer is also connected with an oscillator frequently combining unit, and the second frequency mixer is also connected with two oscillators frequently combining unit.
7. hand-hold type two-band ultrashort wave ground to air radio set according to claim 6, is characterized in that, described receiving element also comprises level detector, crystal resonator, and described level detector connects high-frequency amplifier, and described crystal resonator connects three-mixer.
8. hand-hold type two-band ultrashort wave ground to air radio set according to claim 1, it is characterized in that, described audio unit comprises the first audio frequency amplifier, earphone speaker unit, microphone, the first audio frequency amplifier, the demodulator of receiving element connects the first audio frequency amplifier, described the first audio frequency amplifier frames connecting with headphone loudspeaker unit, described earphone speaker unit also connects CPU processor, described microphone connects the second audio frequency amplifier, and described the second audio frequency amplifier connects the AM amplitude modulator of radio frequency unit.
9. hand-hold type two-band ultrashort wave ground to air radio set according to claim 1, is characterized in that, described aobvious control unit comprises keyboard and OLED display screen, and described keyboard is all connected with CPU processor with OLED display screen.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310625406.4A CN103684515A (en) | 2013-11-30 | 2013-11-30 | Handheld-type dual-frequency-band ultrashort wave air radio station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310625406.4A CN103684515A (en) | 2013-11-30 | 2013-11-30 | Handheld-type dual-frequency-band ultrashort wave air radio station |
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| CN103684515A true CN103684515A (en) | 2014-03-26 |
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| CN201310625406.4A Pending CN103684515A (en) | 2013-11-30 | 2013-11-30 | Handheld-type dual-frequency-band ultrashort wave air radio station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831477A (en) * | 2017-10-20 | 2018-03-23 | 北京无线电测量研究所 | A kind of digital transmitting and receiving component Auto-Test System |
| CN116527073A (en) * | 2023-03-17 | 2023-08-01 | 鹤壁市新元电子有限公司 | Ultra-small double-frequency-band handheld radio station |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203313177U (en) * | 2013-07-05 | 2013-11-27 | 成都天奥信息科技有限公司 | Ultrashort-wave dual-band handheld air station |
| CN203313166U (en) * | 2013-07-05 | 2013-11-27 | 成都天奥信息科技有限公司 | Broadband receiver of handheld aeronautical station |
| CN203590213U (en) * | 2013-11-30 | 2014-05-07 | 成都天奥信息科技有限公司 | Ultrashort-wave dual-band hand-held air ratio station |
-
2013
- 2013-11-30 CN CN201310625406.4A patent/CN103684515A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203313177U (en) * | 2013-07-05 | 2013-11-27 | 成都天奥信息科技有限公司 | Ultrashort-wave dual-band handheld air station |
| CN203313166U (en) * | 2013-07-05 | 2013-11-27 | 成都天奥信息科技有限公司 | Broadband receiver of handheld aeronautical station |
| CN203590213U (en) * | 2013-11-30 | 2014-05-07 | 成都天奥信息科技有限公司 | Ultrashort-wave dual-band hand-held air ratio station |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831477A (en) * | 2017-10-20 | 2018-03-23 | 北京无线电测量研究所 | A kind of digital transmitting and receiving component Auto-Test System |
| CN116527073A (en) * | 2023-03-17 | 2023-08-01 | 鹤壁市新元电子有限公司 | Ultra-small double-frequency-band handheld radio station |
| CN116527073B (en) * | 2023-03-17 | 2024-04-12 | 鹤壁市新元电子有限公司 | Ultra-small double-frequency-band handheld radio station |
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Application publication date: 20140326 |