A method for measuring the efficiency of pulse power amplifying circuits suitable for different duty ratios
A power amplification circuit and pulse power technology, which is applied in the fields of radio frequency circuit testing and electronic circuit testing, etc., can solve problems such as narrow space, inability to place current probes, and inability to calculate intra-pulse efficiency, etc., to achieve strong universality and high intra-pulse efficiency simple effect
Active Publication Date: 2020-10-09
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology
In circuits such as radar transceiver components, the pulse power supply is often composed of a power supply, a secondary power supply and a pulse modulation circuit. The secondary power supply, pulse modulation circuit and power amplifier circuit are integrated and installed inside the component. dct It is the instantaneous current between the pulse modulation circuit and the amplifying circuit. The power supply wires here are mostly planar circuits such as microstrip lines, and because of the small space in the component, it is impossible to place the current probe, so that the I dct Unable to test and therefore unable to calculate intrapulse efficiency
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[0065] See Figure 1-4 The method for measuring the efficiency of a pulse power amplifier circuit with different duty cycles provided by the present invention includes the following steps:
[0066] Step 1: According to the power supply and microwave pulse nesting method, the total power of the power supply is decomposed, and a new efficiency calculation formula based on the decomposed parameters is established; specifically including the following situations:
[0067] 1.1 When the microwave pulses of the power supply are not nested, the total power supplied by the power supply is decomposed into the static power P dc0 , The instantaneous power P of the power supply during the microwave pulse dc1 , The new efficiency calculation formula established is:
[0068]
[0069] Where P mw Is the output power in the microwave pulse pulse of the power amplifier circuit in the circuit under test;
[0070] 1.2 When the microwave pulses of the power supply are strictly nested, the total power sup...
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In order to solve the technical problem of pulse power amplifier circuit efficiency measurement, the invention provides a pulse power amplifier circuit efficiency measurement method suitable for different duty ratios. Based on a constructed average efficiency measurement system, the average efficiency and in-pulse efficiency at any duty ratio under a power level can be deduced and calculated by measuring the average efficiency eta' of 1-3 groups of power amplifier circuits with different duty ratios under the power level. The pulse power amplifier circuit efficiency measurement method has theadvantages of simple test, high feasibility and high universality.
Description
Technical field [0001] The invention belongs to the technical field of microwave measurement, and specifically relates to a method for measuring the efficiency of a pulse power amplifier circuit suitable for different duty ratios. Background technique [0002] Microwave transmitters are an important part of microwave systems and are widely used in civilian fields such as wireless communications, Internet of Things, remote sensing, medical electronics, and measurement and control. The power amplifier circuit is a key component of the microwave transmitter, usually at the end of the transmitter, and its function is to amplify the microwave signal output by the front stage to the required power level. Pulse-based microwave systems are widely used. Pulse-based radars are the mainstream of modern radars. The time-sharing electronic countermeasure systems and burst communication systems are also pulse-based systems. This requires the power amplifier circuit to work in pulse mode. [000...
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IPC IPC(8): G01R31/28
CPCG01R31/2822
Inventor 方文饶黄文华付超邵浩李平章勇华李佳伟王璐璐汪海波
Owner NORTHWEST INST OF NUCLEAR TECH