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A kind of sub-harmonic mixer and ka-band tuner

A sub-harmonic mixer and sub-harmonic mixing technology, which can be used in gigahertz frequency band transmission, multi-frequency modulation transformation, television, etc., can solve the problems of high price and cost, unsuitable for popularization and use, etc.

Active Publication Date: 2019-01-25
深圳市华讯方舟光电技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a sub-harmonic mixer and a Ka-band tuner, aiming at solving the problem that existing sub-harmonic mixer chips capable of processing Ka-band signals are usually manufactured by gallium arsenide (GaAs) technology. Although this kind of design structure can be simplified and the reliability of the circuit can be enhanced at the same time, the price and cost are high and it is not suitable for widespread use

Method used

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  • A kind of sub-harmonic mixer and ka-band tuner
  • A kind of sub-harmonic mixer and ka-band tuner
  • A kind of sub-harmonic mixer and ka-band tuner

Examples

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Embodiment 1

[0029] Such as figure 1 As shown, in this embodiment, the sub-harmonic mixer includes a local oscillator signal filtering module 10 , a high-frequency signal filtering module 20 , a sub-harmonic mixing module 30 and an intermediate frequency signal filtering module 40 .

[0030] The sub-harmonic frequency mixing module 30 includes an anti-parallel Schottky diode pair, and the Schottky diode pair includes a diode D1 and a diode D2, wherein the anode of the diode D1 and the cathode of the diode D2 are connected together to form a sub-harmonic mixer. The input and output terminals of the frequency module 30, the cathode of the diode D1 and the anode of the diode D2 are commonly connected to form the input terminal of the sub-harmonic frequency mixing module 30.

[0031] The input terminal LO IN of the local oscillator signal filter module 10 is connected to the local oscillator signal Vlo, the input terminal RF IN of the high frequency signal filter module 20 is connected to the ...

Embodiment 2

[0035] This embodiment is a further refinement of the internal device structure of the sub-harmonic filter in the first implementation.

[0036] In this embodiment, both the local oscillator signal filtering module 10 and the high frequency signal filtering module 20 use parallel coupled microstrip bandpass filters.

[0037] The microstrip line structure of the local oscillator signal filtering module 10 is an M-order parallel coupled microstrip structure, and the M-order parallel coupled microstrip structure includes M+1 microstrip lines arranged parallel to each other along the length direction of each microstrip line;

[0038] The M+1 microstrip lines are distributed at equal or unequal intervals. When the M+1 microstrip lines are distributed at unequal intervals, the distance between adjacent microstrip lines is equal to the distance between the two middle microstrip lines. The distance between is the benchmark and decreases to both sides;

[0039] The width of the M+1 mi...

Embodiment 3

[0053] This implementation is a further refinement of the sub-harmonic filter provided in Embodiment 1 or Embodiment 2.

[0054] Such as Figure 4 As shown, in this embodiment, the sub-harmonic mixer further includes a low-noise amplifier 50 connected to the input end of the local oscillator signal filtering module 10, and the local oscillator signal Vlo is amplified by the low-noise amplifier 50 and then output to the local oscillator The signal filtering module 10 performs filtering.

[0055] In this embodiment, the sub-harmonic mixing module 30 further includes a current-limiting resistor R1 and a current-limiting resistor R2, wherein the current-limiting resistor R1 is connected in series between the anode of the diode D1 and the input and output terminals of the sub-harmonic mixing module 30 , the current limiting resistor R2 is connected in series between the cathode of the diode D2 and the input and output terminals of the sub-harmonic mixing module 30 .

[0056] In a...

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Abstract

Provided are a sub-harmonic mixer and a Ka band tuner. The sub-harmonic mixer comprises: a local oscillator signal filtering module (10); a high-frequency signal filtering module (20); a sub-harmonic mixing module (30); and an intermediate-frequency signal filtering module (40). The sub-harmonic mixing module (30) comprises a pair of Schottky diodes connected in parallel and mutually reversed. The sub-harmonic mixing module (30) performs frequency mixing on a local oscillator signal filtered by the local oscillator signal filtering module (10) and a high-frequency signal filtered by the high-frequency signal filtering module (20) to obtain an intermediate-frequency signal. The intermediate-frequency signal is outputted after being filtered by the intermediate-frequency signal filtering module (40). The invention exploits a frequency mixing property of an even harmonic of Schottky diodes connected in parallel and arranged opposite to each other to perform frequency mixing on a high-frequency signal and a local oscillator signal to obtain an intermediate-frequency signal, thereby realizing a second harmonic mixing function of a sub-harmonic mixer, and obtaining a better frequency mixing function while significantly reducing production costs of the sub-harmonic mixer.

Description

technical field [0001] The invention belongs to the field of Ka-band communication, in particular to a sub-harmonic mixer and a Ka-band tuner. Background technique [0002] The application of Ka-band millimeter wave in the field of satellite communication is more and more extensive. The device is one of the important devices that affect the performance of the transmission chain. [0003] However, the existing sub-harmonic mixer chips capable of processing Ka-band signals are usually made using gallium arsenide (GaAs) technology. Although this type can simplify the design structure and enhance the reliability of the circuit at the same time, the price and cost are relatively high. , not suitable for widespread use. Contents of the invention [0004] The purpose of the present invention is to provide a sub-harmonic mixer and a Ka-band tuner, aiming at solving the problem that existing sub-harmonic mixer chips capable of processing Ka-band signals are usually manufactured b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03D7/16H04N5/50H04N7/20
CPCH03D7/16
Inventor 陈家诚姚建可丁庆
Owner 深圳市华讯方舟光电技术有限公司