CN206402209U - A kind of C-band receiving unit - Google Patents

Abstract

The utility model provides a kind of C-band receiving unit, including amplitude limit LNA circuit, local oscillation circuit, mixer, electric bridge, AGC gain control circuit is put in first, AGC gain control circuit is put in second, first logarithmic detector and track rail operational amplification circuit, second logarithmic detector and track rail operational amplification circuit, first noise control circuit, second noise control circuit, first VGC controls circuit, 2nd VGC controls circuit, three-terminal voltage-stabilizing circuit, the utility model has binary channels, small volume, noise is low, signal to noise ratio is high, anti- power burns, the features such as reliability is high；It can be widely applied in the fields such as aircraft radio altimeter, radar transceiver and wireless telecommunication system.

Description

A kind of C-band receiving unit

Technical field

The utility model is related to a kind of C-band receiving unit, is received more particularly to a kind of C-band of radio altimeter industrial Component

Background technology

The similar technique of existing receiving unit is mainly manifested in that volume is big, function is single, and radio-frequency front-end is easily by strong signal Puncture, can not meet the requirement of party in request, similar receiving unit substantially flow by：External radio-frequency signal is sent after being received via antenna Enter single-stage (or multistage) low noise amplifier circuit amplification, by sending into low-converter after bandpass filter, and local oscillation signal is carried out Mutually it is mixed, produces intermediate-freuqncy signal, intermediate frequency is exported after amplifying via AGC amplifying circuits, flows into signal processing circuit, general reception Component only has the amplification frequency conversion effect of simple signal, except volume is big, and noise is also than larger, and function is single, it is difficult to meet system Overall requirement.

Utility model content

In view of this, main purpose of the present utility model is to provide a kind of modified C-band transmitting-receiving subassembly.

The technical solution adopted in the utility model is：

In a kind of C-band receiving unit, including amplitude limit LNA circuit, local oscillation circuit, mixer, electric bridge, first Put AGC gain control circuit, put in second AGC gain control circuit, the first logarithmic detector and track rail operational amplification circuit, Second logarithmic detector and track rail operational amplification circuit, the first noise control circuit, the second noise control circuit, the first VGC Circuit, the 2nd VGC controls circuit, three-terminal voltage-stabilizing circuit are controlled, the amplitude limit LNA circuit is sequentially connected mixer, electricity Bridge, it is divided into during two-way is sequentially connected first all the way by electric bridge and puts AGC gain control circuit and the first logarithmic detector and track Rail operational amplification circuit, first logarithmic detector exports vision signal, Ling Yilu all the way with track rail operational amplification circuit It is sequentially connected in the first noise control circuit, the first VGC control circuits, the first VGC control circuits and first and puts AGC gain control Circuit is connected, and AGC gain control circuit, the second logarithmic detector and track rail computing are put in another road of electric bridge in being sequentially connected second Amplifying circuit, the second logarithmic detector and track rail operational amplification circuit export vision signal all the way, and another road is sequentially connected the Two noise control circuits, the 2nd VGC control circuits, the 2nd VGC control circuit to be connected with putting AGC gain control circuit in second, The mixer is connected with local oscillation circuit, the three-terminal voltage-stabilizing circuit respectively with width LNA circuit, local oscillation circuit, first In put AGC gain control circuit, that AGC gain control circuit, the first logarithmic detector and track rail operation amplifier are put in second is electric Road, the second logarithmic detector and track rail operational amplification circuit, the first noise control circuit, the connection of the second noise control circuit.

Compared with prior art, the utility model has that binary channels, small volume, noise are low, signal to noise ratio is high, anti-power burns Ruin, the features such as reliability is high；It can be widely applied to the fields such as aircraft radio altimeter, radar transceiver and wireless telecommunication system In.

Brief description of the drawings

Fig. 1 is connection block diagram of the present utility model；

Fig. 2 is microwave channel of the present utility model and power supply connection block diagram；

Embodiment

Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, herein signal of the present utility model Property embodiment and explanation be used for explaining the utility model, but be not intended as limiting of the present utility model.

Referring to figs. 1 to Fig. 2, the utility model discloses a kind of 1. C-band receiving units, it is characterised in that：Including amplitude limit Put in LNA circuit 1, local oscillation circuit 2, mixer 3, electric bridge 4, first in AGC gain control circuit 5A, second and put AGC Gain control circuit 5B, the first logarithmic detector and track rail operational amplification circuit 6A, the second logarithmic detector and track rail fortune Calculate amplifying circuit 6B, the first noise control circuit 7A, the second noise control circuit 7B, the first VGC control circuits 8A, the 2nd VGC Circuit 8B, three-terminal voltage-stabilizing circuit 9 are controlled, the amplitude limit LNA circuit 1 is sequentially connected mixer 3, electric bridge 4, by electricity Bridge 4, which is divided into during two-way is sequentially connected first all the way, puts AGC gain control circuit 5A and the first logarithmic detector and track rail computing Amplifying circuit 6A, first logarithmic detector and the tunnels of track rail operational amplification circuit 6A mono- export vision signal, another road according to Secondary connection the first noise control circuit 7A, the first VGC control to put AGC gain in circuit 8A, the first VGC controls circuit 8A and first Control circuit 5A connections, another road of electric bridge 4 put in being sequentially connected second AGC gain control circuit 5B, the second logarithmic detector and Track rail operational amplification circuit 6B, the second logarithmic detector exports vision signal with the tunnels of track rail operational amplification circuit 6B mono-, separately The second noise control circuit 7B, the 2nd VGC control circuit 8B, the 2nd VGC are sequentially connected all the way controls circuit 8B with being put in second AGC gain controls circuit 5B connections, and the mixer 3 is connected with local oscillation circuit 2, the three-terminal voltage-stabilizing circuit 9 respectively with Put in width LNA circuit 1, local oscillation circuit 2, first put in AGC gain control circuit 5A, second AGC gain control circuit 5B, First logarithmic detector and track rail operational amplification circuit 6A, the second logarithmic detector and track rail operational amplification circuit 6B, the One noise control circuit 7A, the second noise control circuit 7B connections.

External input signal is put again after amplitude limit LNA circuit 1 carries out low level signal amplification or big signal limiter Greatly, feeding mixer 3 is mutually mixed with the signal of local oscillation circuit 2, is produced and is put AGC gain in feeding first after intermediate-freuqncy signal AGC gain control circuit 5B is put in control circuit 5A or second to carry out after signal attenuation control amplification filtering, sends into the first logarithm Wave detector is with track rail operational amplification circuit 6A or the second logarithmic detector with exporting video after track rail operational amplification circuit 6B Signal.By video output signals coupling small-signal feeding the first noise control circuit 7A or the second noise control circuit 7B, through inspection The first VGC of feeding control circuit 8A or the 2nd VGC after comparison amplifier are sent into after ripple to control after circuit 8B, utilize the spy of diode Property make output comparison amplify after voltage, to share the fortune that outside first VGC control circuit 8A or the 2nd VGC control circuit 8B Amplifier is calculated, is put in putting first in control and AGC gain control circuit 5B output videos is put in AGC gain control circuit 5A or second Signal.

Inputted by externally fed+15V, output+10V DC voltage ,+5V are defeated respectively after the voltage stabilizing of three-terminal voltage-stabilizing circuit 9 Go out voltage and -5V negative dc voltages, complete the normal power supply work of whole receiving unit

The technical scheme disclosed in the utility model embodiment is described in detail above, it is used herein specifically Embodiment is set forth to the principle and embodiment of the utility model embodiment, and the explanation of above example is only applicable to Help understands the principle of the utility model embodiment；It is real according to the utility model simultaneously for those of ordinary skill in the art Example is applied, be will change in embodiment and application, in summary, this specification content should not be understood For to limitation of the present utility model.

Claims (1)

1. a kind of C-band receiving unit, it is characterised in that：Including amplitude limit LNA circuit (1), local oscillation circuit (2), frequency mixer electricity Put in road (3), electric bridge (4), first AGC gain control circuit (5A), put in second AGC gain control circuit (5B), first pair Number wave detector and track rail operational amplification circuit (6A), the second logarithmic detector and track rail operational amplification circuit (6B), first Noise control circuit (7A), the second noise control circuit (7B), the first VGC control circuits (8A), the 2nd VGC control circuits (8B), three-terminal voltage-stabilizing circuit (9), the amplitude limit LNA circuit (1) is sequentially connected mixer (3), electric bridge (4), passed through Electric bridge (4), which is divided into during two-way is sequentially connected first all the way, puts AGC gain control circuit (5A) and the first logarithmic detector and track Rail operational amplification circuit (6A), first logarithmic detector exports video letter all the way with track rail operational amplification circuit (6A) Number, another road is sequentially connected the first noise control circuit (7A), the first VGC control circuits (8A), the first VGC control circuits (8A) It is connected with putting AGC gain control circuit (5A) in first, AGC gain control electricity is put on electric bridge (4) another road in being sequentially connected second Road (5B), the second logarithmic detector and track rail operational amplification circuit (6B), the second logarithmic detector and track rail operation amplifier Circuit (6B) exports vision signal all the way, and another road is sequentially connected the second noise control circuit (7B), the 2nd VGC control circuits (8B), the 2nd VGC control circuit (8B) and put in second AGC gain control circuit (5B) be connected, the mixer (3) and Local oscillation circuit (2) is connected, and the three-terminal voltage-stabilizing circuit (9) in width LNA circuit (1), local oscillation circuit (2), first respectively with putting AGC gain control circuit (5B), the first logarithmic detector and track rail computing is put in AGC gain control circuit (5A), second to put Big circuit (6A), the second logarithmic detector and track rail operational amplification circuit (6B), the first noise control circuit (7A), second are made an uproar Acoustic control circuit (7B) is connected.