CN202168077U

CN202168077U - L-waveband transceiver front-end

Info

Publication number: CN202168077U
Application number: CN2011202574981U
Authority: CN
Inventors: 李通; 李涛
Original assignee: Dfine Technology Co Ltd
Current assignee: Dfine Technology Co Ltd
Priority date: 2011-07-20
Filing date: 2011-07-20
Publication date: 2012-03-14
Anticipated expiration: 2021-07-20

Abstract

The utility model provides an L-waveband transceiver front-end, relating to the technical field of electronics, aiming at solving the technical problems in the traditional transceiver front-end that the integrated level is not high, the stability is insufficient, the noise coefficient is large, the response time is slow, the phase consistency is insufficient, and the like. The L-shaped waveband transceiver front-end consists of a selector switch (4), an amplitude limiter (3), a low-noise amplifier (2) and an equal power divider; the selector switch (4) has four ports, wherein the port 2(12) and the port 3(13) are input ends; the port 1(11) is an input and output end; the selector switch (4) is also provided with an output end that is sequentially connected in series with the amplitude limiter (3), the low-noise amplifier (2) and the equal power divider (1); and the equal power divider (1) has two output ends: port 4(14) and port 5(15).

Description

The L-band receiving and transmitting front end

Technical field

The utility model relates to electronic technology field, particularly a kind of L-band receiving and transmitting front end that is applied to radar antenna.

Background technology

Receiving and transmitting front end is the elementary cell of active solid-state phased array radar.Its performance directly influences the performance index of radar antenna, thereby has influence on whole radar.At present; The development level of receiving and transmitting front end is the most advanced with the U.S.; And the practicalization of active array will depend primarily on the performance of receiving and transmitting front end assembly and reaching of price target, and this also is to promote the power of receiving and transmitting front end assembly to miniaturization, lightweight, broadband, solid state and integrated development.Domesticly aspect phased array radar receiving and transmitting front end assembly, also obtained remarkable progress since the mid-90, because domestic MMIC technology is also not really ripe, basic is main with hybrid microwave integrated circuit (HMIC) still.The research for receiving and transmitting front end both at home and abroad never stopped, and aspect the production of receiving and transmitting front end, especially in cost control, comparing with external equivalents still has sizable gap.

The following weak point of existing L-band receiving and transmitting front end ubiquity:

1) integrated level is not high, stability is not enough;

2) noise factor is big;

3) reaction time is slow, phase equalization is not enough.

Summary of the invention

The utility model is intended to solve that traditional receiving and transmitting front end integrated level is not high, stability is not enough, technical problems such as noise factor is big, the reaction time is slow, phase equalization deficiency, so that the L-band receiving and transmitting front end with advantage such as stable and reliable for performance, that integrated level is high, noise factor is little, the reaction time is fast, phase equalization is good to be provided.

The purpose of the utility model realizes through following technical scheme.

The L-band receiving and transmitting front end of the utility model, by selector switch 4, amplitude limiter 3, low noise amplifier 2 and etc. power splitter 1 constitute; Selector switch 4 has four ports, and its middle port 2 12 be an input with port 3 13, and port 1 is an input/output terminal, and port 3 13 is an input, selector switch 4 have in addition one the tunnel export be connected in series in order amplitude limiter 3, low noise amplifier 2 and etc. power splitter 1; Deng power splitter 1 ports having 4 14 and 5 15 two outputs of port.

The L-band receiving and transmitting front end of the utility model, wherein selector switch 4 has three kinds of model selections, and when one of which was imported by port 3 13 when signal, gating was by port one 11 outputs; It is two when information during by port 1 input, and gating is by port 4 14 and port 5 15 outputs; It is three when information during by port 2 12 input, and gating is by port 4 14 and port 5 15 outputs.

The beneficial effect of the utility model L-band receiving and transmitting front end: stable and reliable for performance, integrated level is high, noise factor is little, the reaction time is fast, phase equalization is good.

Description of drawings

The circuit theory diagrams of Fig. 1 the utility model

Label declaration among the figure

1 power splitter such as grade, 2 low noise amplifiers, 3 amplitude limiters, 4 selector switches, 11 ports one, 12 ports two, 13 ports three, 14 ports four, 15 ports five

Embodiment

The utility model detailed structure, application principle, effect and effect with reference to accompanying drawing 1, are explained through following execution mode.

The utility model by selector switch 4, amplitude limiter 3, low noise amplifier 2 and etc. power splitter 1 constitute; Selector switch 4 has four ports, and its middle port 2 12 be an input with port 3 13, and port 1 is an input/output terminal, and port 3 13 is an input, selector switch 4 have in addition one the tunnel export be connected in series in order amplitude limiter 3, low noise amplifier 2 and etc. power splitter 1; Deng power splitter 1 ports having 4 14 and 5 15 two outputs of port.

Selector switch 4 has three kinds of model selections, and when one of which was imported by port 3 13 when signal, gating was by port one 11 outputs; It is two when information during by port 1 input, and gating is by port 4 14 and port 5 15 outputs; It is three when information during by port 2 12 input, and gating is by port 4 14 and port 5 15 outputs.

Receiving and transmitting front end is accomplished the transmitting-receiving time-sharing work, common antenna as the passage between antenna and the signal processing under the control of transmitting-receiving switching signal.At emission state, export to antenna with carrying out Signal Processing after the modulated emission medium-frequency signal process.

This L-band receiving and transmitting front end adopts the two-stage super-heterodyne architecture, switch receiving by the two-stage switch with transmission channel, receive path by three grades of amplitude limits after, carry out signal by LNA again and amplify the back merit and divide and export.

Radiofrequency signal gets into through selector switch 4 from port 2 12, and signal amplifications that be limited behind match circuit, told the signal of two-way phase place, loss unanimity behind the gating by distributor circuit.

Claims

1.L the wave band receiving and transmitting front end is characterized in that: by selector switch (4), amplitude limiter (3), low noise amplifier (2) and etc. power splitter (1) constitute; Selector switch (4) has four ports; Its middle port two (12) and port three (13) are input; Port one (11) is an input/output terminal, selector switch (4) have in addition one tunnel output be connected in series in order amplitude limiter (3), low noise amplifier (2) and etc. power splitter (1); Deng power splitter (1) ports having four (14) and five (15) two outputs of port.

2. L-band receiving and transmitting front end as claimed in claim 1 is characterized in that: selector switch (4) has three kinds of model selections, and when one of which was imported by port three (13) when signal, gating was by port one (11) output; It is two when information during by port one (11) input, and gating is exported by port four (14) and port five (15); It is three when information during by port two (12) input, and gating is exported by port four (14) and port five (15).