CN203457146U - Radio ultra-short frequency receiver - Google Patents
Radio ultra-short frequency receiver Download PDFInfo
- Publication number
- CN203457146U CN203457146U CN201320570317.XU CN201320570317U CN203457146U CN 203457146 U CN203457146 U CN 203457146U CN 201320570317 U CN201320570317 U CN 201320570317U CN 203457146 U CN203457146 U CN 203457146U
- Authority
- CN
- China
- Prior art keywords
- frequency
- filter
- amplifier
- numerical control
- low noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Superheterodyne Receivers (AREA)
Abstract
The utility model discloses a radio ultra-short frequency receiver comprising a numerically-controlled tuned filter, a first low noise amplifier, a first mixer, a surface acoustic wave filter, a second low noise amplifier, a second mixer, an intermediate-frequency filter and an intermediate-frequency amplifier which are successively connected, wherein a double-frequency superheterodyne receiving mode is used for the numerically-controlled tuned filter, and two ends of the intermediate-frequency amplifier are in parallel connection with an AGC automatic gain unit. The radio ultra-short frequency receiver has the beneficial effects that the double-frequency superheterodyne receiving mode and a broadband electrically-tuned filter are used, and low noise front-end amplifiers are used, abilities of the whole machine for inhibiting image frequencies and noise waves can improved, input dynamic scopes and the whole machine sensitivity are improved, and performance index requirements of data transmission bit error rates and voice communication intelligibility of wireless communication equipment are improved without influencing original functions and performance indexes of the wireless communication equipment.
Description
Technical field
The utility model relates to the ultrashort frequency receiver of a kind of radio, belongs to telecommunication technology field.
Background technology
At wireless communication field, communication equipment becomes increasingly complex, and high-tech content is more and more, function from strength to strength, therefore the receiver of Wireless Telecom Equipment is had higher requirement, require receiver image frequency and clutter to suppress ability strong, input dynamic range and machine sensitivity are high.On one point in the star-like wireless communication system of multiple spot, requirement system employing communication system data transmission error rates is low, speech communication intelligibility is high, in order to guarantee wireless communication system communicating reliability, the image frequency of receiver and clutter inhibition ability are eager to excel, it is high that input dynamic range and machine sensitivity are wanted, but existing radio-frequency transmitter cannot meet these requirements.
Utility model content
The purpose of this utility model is to provide a kind of radio ultrashort frequency receiver, overcome the deficiencies in the prior art, complete machine be can improve to the inhibition ability of image frequency and clutter and input dynamic range and machine sensitivity, wireless communication system communicating distance, data transmission error rate and the requirement of speech communication intelligibility performance index met.
The purpose of this utility model is achieved through the following technical solutions: the ultrashort frequency receiver of a kind of radio, it comprises the numerical control tuning filter connecting successively, the first low noise amplifier, the first frequency mixer, Surface Acoustic Wave Filter, the second low noise amplifier, the second frequency mixer, intermediate-frequency filter, intermediate frequency amplifier, wherein, numerical control tuning filter adopts double frequency superheterodyne reception mode, numerical control tuning filter has two frequency receiving terminals, one of them receiving terminal is connected with the rf inputs as the first input source, another receiving terminal is connected with the frequency hopping control input unit as the second input source, the first frequency mixer is connected with the first local oscillator signal input part as first signal source, the second frequency mixer is connected with the second local oscillation signal input as secondary signal source, the output of intermediate frequency amplifier is as the output of ultrashort wave frequency hopping, the two ends of intermediate frequency amplifier have been arranged in parallel AGC automatic gain unit.
On described numerical control tuning filter, be provided with overload protecting circuit.
Described numerical control tuning filter is broadband electrically tunable filter.
On described numerical control tuning filter, be provided with antenna.
The beneficial effects of the utility model are: the mode that adopts double frequency superheterodyne reception mode and broadband electrically tunable filter, adopt low noise front-end amplifier simultaneously, improved the inhibition ability of complete machine to image frequency and clutter, input dynamic range and machine sensitivity have been improved, can not affect on the basis of the original function of Wireless Telecom Equipment and performance index, improved Wireless Telecom Equipment data transmission error rate and the requirement of speech communication intelligibility performance index simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the utility model numerical control tuning FILTER TO CONTROL data SPI communication sequential chart.
Wherein, 1-numerical control tuning filter, 2-the first low noise amplifier; 3-the first frequency mixer, 4-Surface Acoustic Wave Filter, 5-the second low noise amplifier; 6-the second frequency mixer, 7-intermediate-frequency filter, 8-intermediate frequency amplifier; 9-rf inputs; 10-frequency hopping control input unit, 11-the first local oscillator signal input part, 12-the second local oscillation signal input; 13-AGC automatic gain unit, 14-overload protecting circuit.
Embodiment
Below in conjunction with accompanying drawing, further describe the technical solution of the utility model, but described in claimed scope is not limited to.
As Fig. 1, the ultrashort frequency receiver of a kind of radio, it comprises the numerical control tuning filter 1 connecting successively, the first low noise amplifier 2, the first frequency mixer 3, Surface Acoustic Wave Filter 4, the second low noise amplifier 5, the second frequency mixer 6, intermediate-frequency filter 7, intermediate frequency amplifier 8, wherein, numerical control tuning filter 1 adopts double frequency superheterodyne reception mode, numerical control tuning filter 1 has two frequency receiving terminals, one of them receiving terminal is connected with the rf inputs 9 as the first input source, another receiving terminal is connected with the frequency hopping control input unit 10 as the second input source, the first frequency mixer 3 is connected with the first local oscillator signal input part 11 as first signal source, the second frequency mixer 6 is connected with the second local oscillation signal input 12 as secondary signal source, the output of intermediate frequency amplifier 8 is as the output of ultrashort wave frequency hopping, the two ends of intermediate frequency amplifier 8 have been arranged in parallel AGC automatic gain unit 13.
On described numerical control tuning filter 1, be provided with overload protecting circuit 14.
Described numerical control tuning filter 1 is broadband electrically tunable filter.
On described numerical control tuning filter 1, be provided with antenna.
The utility model is by adopting double frequency superheterodyne reception mode and broadband electrically tunable filter technology, further improve the inhibition ability of complete machine to image frequency and clutter, adopt low noise front-end Amplifier Design simultaneously, and consider great dynamic range input simultaneously and resist to burn protection, in intermediate-frequency strip, adopt fast reaction classification time delay to control agc circuit, under reach-92dBm(+10dB of machine sensitivity signal to noise ratio condition), noise factor is less than 5.5dB, and input dynamic range is greater than 75dB; The strict coupling of controlling each interstage circuit in design, reduces due to the bad impact on signal of coupling simultaneously; In band pass filter band, phase-frequency characteristic, amplitude-frequency characteristic are all designed to linearity, and within the scope of whole incoming level, output intermediate-freuqncy signal level fluctuation is less than 1dB.
Its operation principle is as follows: the faint radio signal in antenna reception space, by numerical control tuning filter 1, select required useful signal and carry out low noise amplification through the first low noise amplifier 2, and through the first frequency mixer 3 mixing, obtain the high intermediate-freuqncy signal that frequency is constant with the input signal of the first local oscillator signal input part 11, clutter outside Surface Acoustic Wave Filter 4 filtering bands, after mirror image suppresses, through the second low noise amplifier 5, carrying out low noise amplifies again, through the second frequency mixer 6 mixing, obtain the Low Medium Frequency signal that frequency spectrum is pure with the input signal of the second local oscillation signal input 12 again, through intermediate frequency amplifier 8 filtering, the intermediate-freuqncy signal of stable output power after intermediate frequency amplifies.Impact due to communication distance and multipath fading, the signal strength signal intensity receiving can occur significantly to fluctuate, therefore in intermediate frequency amplifier 8, adopting delayed AGC automatic gain unit 13 is AGC control circuit, guarantee that the intermediate-freuqncy signal power of output is basicly stable when input signal power generation larger fluctuation.
Under frequency hopping system, frequency hopping control circuit produces the instruction of numerical control tuning filter switching controls, numerical control tuning filter 1 carries out frequency fast according to control command and switches, guarantee the effective received RF signal of receiver, and with synchronize the first local oscillator signal input part 11 mixing of saltus step and obtain constant high intermediate-freuqncy signal, realize the solution of Frequency Hopping Signal and jump.
As Fig. 2, numerical control tuning filter 1 can change working frequency points by digital control scheme in full frequency band, select useful signal, the outer clutter of filtering band and noise, the sensitivity that improves complete machine, this filter adopts 8 bit data to control, response time is less than 50us, control data acquisition SPI communication mode, control circuit adopts string conversion chip to realize, control signal sequential.
Claims (4)
1. the ultrashort frequency receiver of radio, it is characterized in that: it comprises the numerical control tuning filter (1) connecting successively, the first low noise amplifier (2), the first frequency mixer (3), Surface Acoustic Wave Filter (4), the second low noise amplifier (5), the second frequency mixer (6), intermediate-frequency filter (7), intermediate frequency amplifier (8), wherein, numerical control tuning filter (1) adopts double frequency superheterodyne reception mode, numerical control tuning filter (1) has two frequency receiving terminals, one of them receiving terminal is connected with the rf inputs (9) as the first input source, another receiving terminal is connected with the frequency hopping control input unit (10) as the second input source, the first frequency mixer (3) is connected with the first local oscillator signal input part (11) as first signal source, the second frequency mixer (6) is connected with the second local oscillation signal input (12) as secondary signal source, the output of intermediate frequency amplifier (8) is as the output of ultrashort wave frequency hopping, the two ends of intermediate frequency amplifier (8) have been arranged in parallel AGC automatic gain unit (13).
2. the ultrashort frequency receiver of radio according to claim 1, is characterized in that: on described numerical control tuning filter (1), be provided with overload protecting circuit (14).
3. the ultrashort frequency receiver of radio according to claim 1, is characterized in that: described numerical control tuning filter (1) is broadband electrically tunable filter.
4. the ultrashort frequency receiver of radio according to claim 1, is characterized in that: on described numerical control tuning filter (1), be provided with antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570317.XU CN203457146U (en) | 2013-09-13 | 2013-09-13 | Radio ultra-short frequency receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320570317.XU CN203457146U (en) | 2013-09-13 | 2013-09-13 | Radio ultra-short frequency receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203457146U true CN203457146U (en) | 2014-02-26 |
Family
ID=50136987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320570317.XU Expired - Lifetime CN203457146U (en) | 2013-09-13 | 2013-09-13 | Radio ultra-short frequency receiver |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203457146U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105530019A (en) * | 2015-12-15 | 2016-04-27 | 北京中科飞鸿科技有限公司 | Miniature broadband mixing and filtering amplification module with high performance and high integration level |
| CN106443177A (en) * | 2016-08-15 | 2017-02-22 | 中国电子科技集团公司第四十研究所 | Wide bandwidth frequency agile signal measurement instrument and measurement method |
-
2013
- 2013-09-13 CN CN201320570317.XU patent/CN203457146U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105530019A (en) * | 2015-12-15 | 2016-04-27 | 北京中科飞鸿科技有限公司 | Miniature broadband mixing and filtering amplification module with high performance and high integration level |
| CN106443177A (en) * | 2016-08-15 | 2017-02-22 | 中国电子科技集团公司第四十研究所 | Wide bandwidth frequency agile signal measurement instrument and measurement method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20110134810A1 (en) | Module for use in mobile communication terminal and mobile communication terminal applying the same therein | |
| US9204488B2 (en) | Wireless communication transmitting and receiving system | |
| CN106301516B (en) | Diversity receiver and terminal | |
| CN102832959B (en) | Radio-frequency front end in high and medium frequency superheterodyne+zero intermediate frequency structure | |
| CN105553494A (en) | Radio frequency front-end frequency selection circuit and signal receiving method thereof | |
| CN103546188A (en) | Wireless mobile terminal of self-tuning antenna and adjusting method of self-tuning antenna | |
| CN102148622A (en) | Method for eliminating mutual interference among terminal modes and terminal | |
| CN102412861A (en) | Emitting filter and mobile terminal | |
| EP3944577A1 (en) | Pre-distortion processing device, signal transmission system, and pre-distortion processing method | |
| KR101715403B1 (en) | Multimode wireless modem | |
| CN107979388A (en) | A kind of wave filter group device of ultrashort wave broadband transceiver | |
| CN204228950U (en) | A kind of radar system L-band transceiver | |
| CN215818097U (en) | Radio frequency power amplifying circuit, transmitting module, communication equipment and communication system | |
| CN203457146U (en) | Radio ultra-short frequency receiver | |
| CN102420686B (en) | A kind of frequency division duplex device and mobile terminal | |
| CN110677168A (en) | 5G terminal signal transceiving device and method and terminal | |
| CN204131508U (en) | A kind of radio ultra short wave communication receiver | |
| CN214256304U (en) | Signal receiving and transmitting module for WIFI radio frequency front end | |
| CN104467916A (en) | An ultrashort wave frequency-hopping receiver | |
| CN203596817U (en) | Frequency hopping transmitter | |
| CN112737621A (en) | Down-conversion module for investigation and interference integrated equipment | |
| CN203691386U (en) | Ultrashort wave frequency conversion channel | |
| CN203522670U (en) | Short-wave tracking tuned filter circuit | |
| CN207706181U (en) | A kind of filter group device of ultrashort wave broadband transceiver | |
| CN204794914U (en) | Radio frequency power amplifier wave filter subassembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140226 |
|
| CX01 | Expiry of patent term |