CN202978825U

CN202978825U - Broadband two-path balanced low-noise amplifier

Info

Publication number: CN202978825U
Application number: CN 201220622633
Authority: CN
Inventors: 蒋德龙; 徐克兴; 赵天新
Original assignee: Dfine Technology Co Ltd
Current assignee: Dfine Technology Co Ltd
Priority date: 2012-11-22
Filing date: 2012-11-22
Publication date: 2013-06-05
Anticipated expiration: 2022-11-22

Abstract

The utility model discloses a broadband two-path balanced low-noise amplifier, which relates to the field of electronic communication and aims to solve the technical problems of high noise, decrease of gain along with the increase in frequency, performance deterioration in a severe environment and the like existing in the conventional broadband two-path balanced low-noise amplifier product. In the broadband two-path balanced low-noise amplifier disclosed by the utility model, an input signal I is input into an amplitude limiter I (1), and passes through an alternative switch I (2), an amplifier I (3), a numerical control attenuator I (4), an amplifier II (5), an amplifier III (6), a balancer I (7), an amplifier IV (8) and a balancer II (9), so that a first path signal is output outwards; and an input signal II is input into an amplitude limiter (II), and passes through an alternative switch II (12), an amplifier V (13), a numerical control attenuator II (14), an amplifier VI (15), an amplifier VII (16), a balancer III (17), an amplifier VIII (18) and a balancer IV (19), so that a second path signal is output outwards.

Description

The balanced low noise amplifier of wideband double-path

Technical field

The utility model relates to electronic communication field, particularly the balanced low noise amplifier of a kind of wideband double-path for satellite communication, radar communication, electronic countermeasures.

Background technology

The balanced low noise amplifier of wideband double-path is the connection antenna of ultra broadband high sensitive receiver in the fields such as satellite communication, radar communication, electronic countermeasures and the critical component of receiver, by the balanced low noise amplifier of wideband double-path, (gain of low frequency end is high for the backslash rate, the high-frequency end gain is low) compensate antenna to the loss of feeder line under different frequency of receiver, thus make the broadband signal that receives basically identical to the amplitude that improves receiver.

The balanced low noise amplifier product of existing wideband double-path exists and mainly has following shortcoming:

1. noise is higher;

2. gain reduces with the frequency increase;

3. mis-behave under adverse circumstances.

Summary of the invention

The utility model is intended to solve that the balanced low noise amplifier product of existing wideband double-path exists that noise is higher, gain with frequency increase reduces and under adverse circumstances the technical problem such as mis-behave, with provide a kind of solved gain with frequency gain that the difficult problem, the working band that reduce are wide, gain is convenient to regulate, the suitable adverse circumstances use such as outdoor, the wideband double-path equilibrium low noise amplifier being convenient to safeguard.

The purpose of this utility model is achieved through the following technical solutions.

The balanced low noise amplifier of wideband double-path of the present utility model, input signal one is sent into amplitude limiter 1, the backward outer output first via signal of first input end, amplifier 1, numerical-control attenuator 1, amplifier 25, amplifier 36, equalizer 1, amplifier 48, equalizer 29 of the output serial connection either-or switch 1 of amplitude limiter 1; Input signal two is sent into amplitude limiter 2 11, backward outer output the second road signal of first input end, amplifier 5 13, numerical-control attenuator 2 14, amplifier 6 15, amplifier 7 16, equalizer 3 17, amplifier 8 18, equalizer 4 19 of the output serial connection either-or switch 2 12 of amplitude limiter 2 11; Self-test signal is sent into power splitter 10, and the first output of power splitter 10 connects the second input of either-or switch 1, and the second output of power splitter 10 connects the second input of either-or switch 2 12.

The beneficial effect of the balanced low noise amplifier of the utility model wideband double-path: solved gain and gain that the difficult problem, the working band that reduce are wide, gain is convenient to regulate, be fit to the adverse circumstances use such as outdoor, be convenient to maintenance with frequency.

Description of drawings

Fig. 1 structure principle chart of the present utility model

The number in the figure explanation:

1 amplitude limiter one, 2 either-or switch one, 3 amplifiers one, 4 numerical-control attenuators one, 5 amplifiers two, 6 amplifiers three, 7 equalizers one, 8 amplifiers four, 9 equalizers two, 10 power splitters, 11 amplitude limiters two, 12 either-or switch two, 13 amplifiers five, 14 numerical-control attenuators two, 15 amplifiers six, 16 amplifiers seven, 17 equalizers three, 18 amplifiers eight, 19, equalizer four

Embodiment

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

Consult shown in Figure 1, the balanced low noise amplifier of wideband double-path of the present utility model, input signal one is sent into amplitude limiter 1, the backward outer output first via signal of first input end, amplifier 1, numerical-control attenuator 1, amplifier 25, amplifier 36, equalizer 1, amplifier 48, equalizer 29 of the output serial connection either-or switch 1 of amplitude limiter 1; Input signal two is sent into amplitude limiter 2 11, backward outer output the second road signal of first input end, amplifier 5 13, numerical-control attenuator 2 14, amplifier 6 15, amplifier 7 16, equalizer 3 17, amplifier 8 18, equalizer 4 19 of the output serial connection either-or switch 2 12 of amplitude limiter 2 11; Self-test signal is sent into power splitter 10, and the first output of power splitter 10 connects the second input of either-or switch 1, and the second output of power splitter 10 connects the second input of either-or switch 2 12.

The balanced low noise amplifier of wideband double-path of the present utility model is mainly by input wide band limiter, single-pole double-throw switch (SPDT), prime wideband low noise amplifier, broadband numerical-control attenuator, Wideband Equalizer, the compositions such as broadband power divider.

Input chopper has that Insertion Loss is little, and standing-wave ratio is little, anti-ly burns the characteristics such as power high (the 2W continuous wave did not burn in 10 minutes), thereby has guaranteed the fail safe of this product under complex electromagnetic environment.

Prime broadband noise amplifier has that noise factor is low, and bandwidth of operation is wide, stable working state, and the characteristics that are easy to debug, thus guaranteed difficulty in noise factor and actual debugging.

Wideband Equalizer has in 800MHz～18GHz scope, and Insertion Loss increases the characteristic that reduces with frequency, has guaranteed the characteristic of the gain backslash rate of product.

The broadband numerical-control attenuator is conducive to be convenient to the client and regulates at any time channel gain to the Best Point that oneself uses.

Two-way is the band self-checking function all, is convenient to customer care.

The key technical indexes that the balanced low noise amplifier of wideband double-path of the present utility model is realized is as follows:

A) input and output voltage standing-wave ratio :≤2.5:1;

B) amplitude limit power: 2W (CW design load);

C) input power≤10dBm, frequency input signal is as follows:

I. first via 0.8GHz～18GHz

Ii. the second road 2GHz～18GHz

D) input P _-1〉=-25dBm;

E) the input module self-test signal 1 the tunnel, frequency range: 0.8GHz～18GHz;

F) noise factor: below 2GHz :≤6.5dB is more than 2GHz :≤6dB;

G) input signal power≤-during 20dBm, channel gain:

I. during 800MHz, gain 〉=7dB;

Ii. during 2GHz, gain 〉=10dB;

Iii. during 4GHz, gain 〉=12dB;

Iv. during 8GHz, gain 〉=17dB;

V. during 13GHz, gain 〉=20dB;

Vi. during 18GHz, gain 〉=26dB;

H) two-way passage band 5dB stepping, the numerical control attenuation function of maximum 30dB.

Therefore, the balanced low noise amplifier of wideband double-path of the present utility model has and has solved gain and gain that the difficult problem, the working band that reduce are wide, gain is convenient to regulate, the suitable adverse circumstances use such as outdoor, be convenient to many technical characterstics such as maintenance with frequency.

Claims

1. the balanced low noise amplifier of wideband double-path, it is characterized in that: input signal one is sent into amplitude limiter one (1), the backward outer output first via signal of first input end, amplifier one (3), numerical-control attenuator one (4), amplifier two (5), amplifier three (6), equalizer one (7), amplifier four (8), equalizer two (9) of the output serial connection either-or switch one (2) of amplitude limiter one (1); Input signal two is sent into amplitude limiter two (11), backward outer output the second road signal of first input end, amplifier five (13), numerical-control attenuator two (14), amplifier six (15), amplifier seven (16), equalizer three (17), amplifier eight (18), equalizer four (19) of the output serial connection either-or switch two (12) of amplitude limiter two (11); Self-test signal is sent into power splitter (10), and the first output of power splitter (10) connects the second input of either-or switch one (2), and the second output of power splitter (10) connects the second input of either-or switch two (12).