Shortwave antenna tuning insertion loss test method and fixture

A technology of insertion loss and test method, applied in the direction of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve the problems of inability to measure, measure the insertion loss of antennas, lack of transmission efficiency of short-wave antennas, etc., to ensure Communication quality, effect of reducing RF loss

Active Publication Date: 2017-06-30
PANDA ELECTRONICS GROUP +1
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Problems solved by technology

[0013] However, because the impedance of the output end of the tuner changes with the matching antenna and frequency, different frequency points and different antennas have different matching network parameters corresponding to the tuner, so it cannot be directly connected to a network analyzer whose input and output port impedances are both 50Ω. Measure its S parameters, so there is no effective method to measure the insertion loss of the antenna tuner at home and abroad, and there is also a lack of relevant indicators to measure the transmission efficiency of the shortwave antenna tuner

Method used

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  • Shortwave antenna tuning insertion loss test method and fixture

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Embodiment Construction

[0022] The schematic block diagram of the test fixture designed for this test method is as follows: figure 1 As shown, the test fixture for shortwave antenna tuner insertion loss test mainly includes vector network analyzer, measurement and control computer, radio frequency transfer switch K1 and the antenna under test. K1 connection, K1 connects the antenna under test 1 on the antenna port 2 at the first position, that is, the antenna under test is connected to the antenna under test; K1 connects the antenna port 2 with the Yanet port at the second position, and is about to be tested The antenna is connected to the vector net port; entering the port impedance and transforming it mathematically is the usual way.

[0023] The output terminal of the measurement and control computer controls the control switch K1 and the antenna under test. The measurement and control computer has the following functions:

[0024] a) Set the vector network parameters and read the measurement dat...

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Abstract

The invention provides a shortwave antenna tuning insertion loss test fixture comprising a vector network analyzer, a measurement and control computer, a radio frequency conversion switch K1 and tested antenna tuning and an antenna, wherein the measurement and control computer is connected with a vector network, the tested antenna tuning and the radio frequency conversion switch K1 through a serial port or a network port, the K1 communicates the tested antenna tuning 1 on an antenna port 2 at a first position, namely the connects the tested antenna tuning to the tested antenna; the K1 communicates the antenna port 2 with a vector network port at a second position, namely connects the tested antenna to the vector network port; and an output end of the measurement and control computer controls a control switch K1 and the tested antenna tuning.

Description

[0001] 1. Technical field [0002] The invention belongs to the technical field of short-wave communication equipment and related electronic circuits, in particular to a test method and design for the insertion loss of a short-wave antenna tuner. [0003] 2. Background technology [0004] The short-wave communication frequency band is wide (1.6MHz-30MHz), and the input impedance of the narrowband antenna changes with the frequency, which is a complex impedance, while the output impedance of the general transmitter is 50Ω, so the antenna tuner (hereinafter referred to as the antenna tuner) is needed to realize the transmission. The impedance matching between the transmitter and the antenna maximizes the power of the transmitter to the antenna. [0005] A vector network analysis instrument is a test device for electromagnetic wave energy. It can not only measure the magnitude of various parameters of a single-port network or two-port network, but also measure the phase. The vect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/10G01R27/02
CPCG01R27/02H04B17/101
Inventor 刘科伟李宏哲仲小正
Owner PANDA ELECTRONICS GROUP
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