CN209545557U

CN209545557U - A kind of Microwave Frequency Source

Info

Publication number: CN209545557U
Application number: CN201822247579.8U
Authority: CN
Inventors: 王秀轮; 张贵军; 焦新年
Original assignee: SHIJIAZHUANG DONGTAIER COMMUNICATION TECHNOLOGY Co Ltd
Current assignee: SHIJIAZHUANG DONGTAIER COMMUNICATION TECHNOLOGY Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2019-10-25
Anticipated expiration: 2028-12-29

Abstract

The utility model discloses a kind of Microwave Frequency Sources, belong to microwave communication and signal source domain comprising control unit, reference clock unit and phase locking unit；The corresponding output end of the reference clock unit is electrically connected the input terminal of the phase locking unit；The output end of described control unit is electrically connected the respective input of the phase locking unit；The utility model is combined by direct digital synthesis technique with PHASE-LOCKED LOOP PLL TECHNIQUE, is realized 100~1500MHz, low phase noise, the small stepping rate-adaptive pacemaker in broadband that stepping is 1Hz, be can be applied to microwave communication, signal frequency source and small stepping frequency hopping synthesizer.

Description

A kind of Microwave Frequency Source

Technical field

The utility model relates to a kind of Microwave Frequency Sources, and in particular to a kind of small stepping low phase noise phase locked source in broadband, Belong to microwave communication and signal source domain.

Background technique

Microwave communication is the electromagnetic wave using wavelength between 1 millimeter to 1 meter -- the communication that microwave carries out.Wavelength period electricity Frequency range corresponding to magnetic wave is 300 MHz (0.3 GHz) ~ 300 GHz.

Unlike the modern communication networks transmission mode such as coaxial cable communication, fiber optic communication and satellite communication, microwave is logical Letter is the communication for directly microwave being used to carry out as medium, solid dielectric is not needed, when accessible in point-to-point transmission linear distance Microwave transmission can be used.Communicate big, high-quality with capacity using microwave and far distance can be reached, therefore is A kind of important communication means of national communication net, are also generally applicable to various private wire networks.

Microwave communication is 1m to 0.1mm, the communication that the electromagnetic wave that frequency is 0.3GHz to 3THz carries out using wavelength.It is wrapped Include terrestrial microwave relay communication, tropospheric scatter communication, satellite communication, space communication and work in microwave band movement it is logical Letter.Microwave communication has the characteristics that available frequency bandwidth, message capacity are big, transmission impairment is small, strong antijamming capability, can be used for a little pair The communication modes such as point, point to multi--point or broadcast.

In microwave communication and signal testing, being limited to existing locking phase chip cannot achieve the small stepping low phase noise in broadband Phase locked source.

Utility model content

The technical problem to be solved by the utility model is to provide one kind can be realized the small stepping low phase noise in broadband The Microwave Frequency Source of locking phase.

The technical solution of the utility model is as follows:

A kind of Microwave Frequency Source comprising control unit, reference clock unit and phase locking unit；The reference clock unit Corresponding output end be electrically connected the input terminal of the phase locking unit；The output end of described control unit is electrically connected the phase locking unit Respective input.

Further, the phase locking unit include phase-locked loop chip, loop filter, voltage controlled oscillator, the first amplifier, First low-pass filter, power splitter, bandpass filter, the second amplifier, DDS, third amplifier and the second low-pass filter；Institute The input terminal for stating phase-locked loop chip is electrically connected the corresponding output end of the reference clock unit and control unit, output end It is electrically connected the loop filter respective input；The corresponding output end of the loop filter is successively through voltage controlled oscillator, The input terminal of one amplifier and the first low-pass filter electrical connection power splitter, one of output end of the power splitter is successively through band logical Filter, the second amplifier, DDS and third amplifier are electrically connected the input terminal of the second low-pass filter, second low pass filtered The output end of wave device is electrically connected the respective input of the phase-locked loop chip.

Further, the corresponding output end of described control unit is electrically connected with the controlled end of DDS.

Further, described control unit is single chip computer AT xmega16E5-AU.

Further, the DDS input reference signal be set as among 100~1500MHz using 1Hz frequency as stepping Arbitrary frequency point.

The beneficial effects of the utility model are as follows:

The utility model is combined by direct digital synthesis technique with PHASE-LOCKED LOOP PLL TECHNIQUE, realizes 100~1500MHz, low Phase noise, the small stepping rate-adaptive pacemaker in broadband that stepping is 1Hz.The utility model can be applied to microwave communication, signal frequency Source and small stepping frequency hopping synthesizer.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is the clock unit schematic diagram of the utility model.

Fig. 3 is the phase locking unit schematic diagram of the utility model.

Specific embodiment

The utility model is described in further detail below with reference to Fig. 1 ~ Fig. 3 and specific embodiment.

As shown in Fig. 1 ~ Fig. 3, the present embodiment is related to a kind of Microwave Frequency Source comprising control unit, reference clock unit And phase locking unit；The corresponding output end of the reference clock unit is electrically connected the input terminal of the phase locking unit；The control is single The output end of member is electrically connected the respective input of the phase locking unit.

Further, described control unit is single chip computer AT xmega16E5-AU.

Further, the DDS is Direct Digital Synthesizer.

In the present embodiment, clock unit exports 100MHz signal all the way.Phase locking unit is motivated by 100MHz signal, is realized The output of 100~1500MHz signal.Pass through the excitation of 100MHz signal in phase locking unit, the frequency dividing ratio that phase-locked loop chip is arranged is Fixed value 1, setting DDS circuit make the fixed 100MHz of its output frequency, and DDS input reference signal is set as 100~1500MHz It is intermediate using 1Hz frequency as the arbitrary frequency point of stepping.

The present embodiment is combined by direct digital synthesis technique with PHASE-LOCKED LOOP PLL TECHNIQUE, realizes 100~1500MHz, low phase Position noise, the small stepping rate-adaptive pacemaker in broadband that stepping is 1Hz.The present embodiment can be applied to microwave communication, signal frequency source and Small stepping frequency hopping synthesizer.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It can still modify to technical solution documented by previous embodiment, or be equal to part of technical characteristic Replacement；And these are modified or replaceed, the utility model embodiment technical solution that it does not separate the essence of the corresponding technical solution Spirit and scope.

Claims

1. a kind of Microwave Frequency Source, it is characterised in that: it includes control unit, reference clock unit and phase locking unit；The ginseng The corresponding output end for examining clock unit is electrically connected the input terminal of the phase locking unit；The output end of described control unit is electrically connected institute State the respective input of phase locking unit.

2. Microwave Frequency Source according to claim 1, it is characterised in that: the phase locking unit includes phase-locked loop chip, ring Path filter, voltage controlled oscillator, the first amplifier, the first low-pass filter, power splitter, bandpass filter, the second amplifier, DDS, third amplifier and the second low-pass filter；The input terminal of the phase-locked loop chip is electrically connected the reference clock list The corresponding output end of member and control unit, output end are electrically connected the loop filter respective input；The loop filtering Input of the corresponding output end of device successively through voltage controlled oscillator, the first amplifier and the first low-pass filter electrical connection power splitter End, one of output end of the power splitter is successively through bandpass filter, the second amplifier, DDS and third amplifier electrical connection the The output end of the input terminal of two low-pass filters, second low-pass filter is electrically connected the corresponding input of the phase-locked loop chip End.

3. Microwave Frequency Source according to claim 2, it is characterised in that: the corresponding output end and DDS of described control unit Controlled end electrical connection.

4. Microwave Frequency Source according to claim 1 to 3, it is characterised in that: described control unit is single-chip microcontroller ATxmega16E5-AU。

5. Microwave Frequency Source according to claim 2 or 3, it is characterised in that: the DDS input reference signal is set as Among 100~1500MHz using 1Hz frequency as the arbitrary frequency point of stepping.