CN104660251A - Novel broadband radio frequency source - Google Patents
Novel broadband radio frequency source Download PDFInfo
- Publication number
- CN104660251A CN104660251A CN201310576109.5A CN201310576109A CN104660251A CN 104660251 A CN104660251 A CN 104660251A CN 201310576109 A CN201310576109 A CN 201310576109A CN 104660251 A CN104660251 A CN 104660251A
- Authority
- CN
- China
- Prior art keywords
- power supply
- frequency source
- radio frequency
- broadband radio
- frequency
- 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.)
- Pending
Links
- 230000006978 adaptation Effects 0.000 claims description 6
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Landscapes
- Transmitters (AREA)
Abstract
The invention relates to a novel broadband radio frequency source and particularly relates to improvement of the novel broadband radio frequency source, belonging to the technical field of telecommunication. The novel broadband radio frequency source has stable performance and strong anti-jamming capacity. The novel broadband radio frequency source comprises a loop filter, an output impedance matcher, a transmitter phase lock loop (PLL), a power supply, a filter attenuation network, an amplifier and a switch. The novel broadband radio frequency source is characterized in that the loop filter and the transmitter PLL are connected with the power supply through the switch; the transmitter PLL is connected with the power supply through the amplifier; the power supply is also connected with the filter attenuation network, a broadband frequency synthesizer and the output impedance matcher.
Description
Technical field
the invention belongs to technical field of telecommunications, especially relate to a kind of improvement of Wideband rf frequency source.
Background technology
frequency synthesis technique is the important component part of radio-frequency electronics, is widely used in the fields such as communication, radar, broadcast, TV and modern thermometrically instrument.Along with the development of electronic technology, require that the frequency stability of frequency source is more and more higher, frequency range is more and more wider, has therefore occurred frequency synthesis source, i.e. frequency synthesizer.Frequency synthesis technique based on Design of PLL has advantages such as being easy to integrated, lock speed is fast, reference frequency output is wide, phase noise is low, spurious reduction is good.
a kind of Up/Down Conversion device for transceiver provides the method for designing of the wideband frequency source circuit of local oscillation signal.This transceiver application is in the test of the various wireless communication standard terminals such as CMMB, GSM, TD-SCDMA, LTE, therefore the output frequency of frequency source requires as 400MHz-2800MHz, in order to cover the frequency range of above all communication standards, and power output can not fluctuate too large, need between-6dBm to+6dBm to meet the input requirements of frequency converter.Because in whole band limits, obvious decline can not appear in performance index, this is difficult to meet the demands with regard to the circuit making discrete device realize, general frequency synthesis chip also cannot be applied because meeting wide band requirement, and broadband character too increases the difficulty of PCB placement-and-routing simultaneously.Again because this Transceiver Module is used among the communication test instrument of test terminal, this just requires that this frequency source will have excellent phase noise performance and harmonic inhabitation and spuious ability, specific requirement is that phase noise is all better than-90dBc/Hz@10kHz at full frequency band, and harmonic component is not higher than-50dBc, spurious components is not then higher than-70dBc.Mainly meet the product of one or both standards at present on the market, even if there is the module of broad frequency band, also can not satisfy the demands because performance index are poor.If adopt multiple frequency synthesizer chip to cover all frequency ranges, then board area can be caused excessive, be not suitable for using in standardized machine frame.Therefore need to take a kind of design that can better meet wideband requirements, the circuit design and the PCB design that are aided with excellence reach good performance index.
Summary of the invention
the present invention is exactly for the problems referred to above, provides a kind of stable performance, a kind of Wideband rf frequency source that antijamming capability is strong.
for achieving the above object, the present invention adopts following technical scheme, the present invention includes loop filter, output impedance adaptation, transmitter PLL, power supply, algorithm network, amplifier and switch, it is characterized in that: annular filter is connected with power supply by switch with transmitter PLL, transmitter PLL is connected with power supply by amplifier, and power supply is also connected with output impedance adaptation with algorithm network, wideband frequency synthesizer.
as a kind of preferred version, wideband frequency synthesizer of the present invention is ADF4350 wideband frequency synthesizer.ADF4350 is the wideband frequency synthesizer that a integrated level is very high, this chip internal is integrated with the VCO of low phase noise, therefore only needs to access suitable reference source, adds loop filter, just can form complete phase-locked loop, for realizing integral frequency divisioil or fractional frequency division output.
beneficial effect of the present invention.
the present invention utilizes ADF4350 frequency synthesizer chip to coordinate some peripheral circuits to carry out designing the implementation procedure of broadband local oscillator source module, the item giving the key parameter in Design of Frequency Synthesizer and should be noted that.Several aspects to should be noted that in design process: the selection etc. of the design of loop filter, the coupling of output circuit, power supply supply is analyzed.Pass through the debugging to hardware circuit and optimization, shown by test result, design can satisfy the demands.
Accompanying drawing explanation
in order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with the drawings and the specific embodiments, the present invention is further elaborated.Should be appreciated that embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
fig. 1 is schematic block circuit diagram of the present invention.
Embodiment
as shown in the figure, the present invention includes loop filter, output impedance adaptation, transmitter PLL, power supply, algorithm network, amplifier and switch, it is characterized in that: annular filter is connected with power supply by switch with transmitter PLL, transmitter PLL is connected with power supply by amplifier, and power supply is also connected with output impedance adaptation with algorithm network, wideband frequency synthesizer.
wideband frequency synthesizer of the present invention is ADF4350 wideband frequency synthesizer.ADF4350 is the wideband frequency synthesizer that a integrated level is very high, this chip internal is integrated with the VCO of low phase noise, therefore only needs to access suitable reference source, adds loop filter, just can form complete phase-locked loop, for realizing integral frequency divisioil or fractional frequency division output.
loop filter is a very important part in phase-locked loop, some such as phase noises and the crucial performance index such as spuious of which determining phase-locked loop.In the output signal of charge pump, high fdrequency component is the interference signal needing filtering, and therefore loop filter should be designed to a low pass filter.
conventional loop filter is divided into passive filter and active filter two class.Active filter introduces noise because adopting amplifier, so the phase noise performance of the PLL of employing active filter can than the PLL output difference adopting passive filter.Therefore select passive filter in the design as far as possible.
be understandable that, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.
Claims (2)
1. a Wideband rf frequency source, comprise loop filter, output impedance adaptation, transmitter PLL, power supply, algorithm network, amplifier and switch, it is characterized in that: annular filter is connected with power supply by switch with transmitter PLL, transmitter PLL is connected with power supply by amplifier, and power supply is also connected with output impedance adaptation with algorithm network, wideband frequency synthesizer.
2. a kind of Wideband rf frequency source according to claim 1, is characterized in that: described wideband frequency synthesizer is ADF4350 wideband frequency synthesizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310576109.5A CN104660251A (en) | 2013-11-18 | 2013-11-18 | Novel broadband radio frequency source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310576109.5A CN104660251A (en) | 2013-11-18 | 2013-11-18 | Novel broadband radio frequency source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104660251A true CN104660251A (en) | 2015-05-27 |
Family
ID=53251008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310576109.5A Pending CN104660251A (en) | 2013-11-18 | 2013-11-18 | Novel broadband radio frequency source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104660251A (en) |
-
2013
- 2013-11-18 CN CN201310576109.5A patent/CN104660251A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105187060B (en) | The phase-locked loop circuit and its implementation of a kind of low phase noise | |
| CN103795410A (en) | Broadband frequency agility frequency source based on double phase-locked loops | |
| CN103762979B (en) | Broadband frequency source for LTE channel simulator | |
| US7013120B2 (en) | Walking weaver image reject mixer for radio | |
| Jahan et al. | A low-power FSK/OOK transmitter for 915 MHz ISM band | |
| Rong et al. | A 0.05-to 10-GHz, 19-to 22-GHz, and 38-to 44-GHz Frequency Synthesizer for Software-Defined Radios in 0.13-$\mu\mbox {m} $ CMOS Process | |
| CN111106830B (en) | Fast and agile broadband frequency synthesizer | |
| CN204304996U (en) | A kind of radio frequency power amplifying device for ultrashort wave radio set | |
| CN107947790B (en) | Broadband fine stepping low-noise frequency source | |
| CN113162617A (en) | Low-phase-noise X-band frequency source and modulation method thereof | |
| CN217824930U (en) | Broadband phase-locked loop circuit and phase-locked loop module | |
| CN212627862U (en) | Frequency synthesizer for avoiding integer multiple boundary stray | |
| CN209218046U (en) | A kind of up-converter module inhibiting intermodulation signal | |
| CN107437969B (en) | Low-noise frequency-amplifying point detection device | |
| CN203135850U (en) | DDS local oscillator source for raising reciprocal mixing index of short wave receiver | |
| CN104660251A (en) | Novel broadband radio frequency source | |
| CN117081583A (en) | Frequency source for improving phase noise | |
| CN202364176U (en) | Clock circuit | |
| CN213094180U (en) | Frequency source circuit | |
| CN112039539B (en) | Communication device, modulation module, antenna system and communication equipment | |
| CN219627696U (en) | Small broadband small-step frequency hopping phase-locked source | |
| CN210780729U (en) | Local oscillator signal generating circuit applied to radio frequency transceiver | |
| CN202696580U (en) | Double-tuned phase-locked rapid hopping source | |
| CN113992224A (en) | Sub-6G-LTCC radio frequency front end microsystem module | |
| KR20070031093A (en) | Quadrature Voltage Controlled Oscillator and Wireless Transceiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |
|
| WD01 | Invention patent application deemed withdrawn after publication |