Method and device for calculating insertion loss of receiving circuit of radio frequency circuit, and radio frequency circuit

Abstract

The invention discloses a method and device for calculating the insertion loss of a receiving circuit of a radio frequency circuit, and a radio frequency circuit. The method comprises the following steps: receiving the receiving circuit power P1 fed back by a first coupler and received signal power P2 fed back by a second coupler in a predetermined frequency band; separately subtracting P1 with each P2 to obtain an insertion loss value between the first coupler and the second coupler in the predetermined frequency band; and outputting the insertion loss value. According to the method and device disclosed by the invention, the P1 and the P2 necessary for calculating the insertion loss value of the predetermined frequency band in the receiving circuit can be obtained quickly and conveniently through the receiving circuit power P1 and the received signal power P2; the P1 is subtracted with each P2 to obtain the insertion loss value of the predetermined frequency band corresponding to each P2, and the insertion loss value is output, so that a radio frequency engineer can quickly and conveniently test the insertion loss of the receiving circuit of the radio frequency circuit, the difficulty of determining the problem point of the receiving circuit is reduced, and the efficiency of radio frequency debugging is improved.

Description

technical field [0001] The present invention relates to the technical field of terminal applications, in particular to a method and device for calculating insertion loss of a receiving path of a radio frequency circuit, a radio frequency circuit and a terminal. Background technique [0002] With the rapid development of science and technology in modern society, people's demand for terminals such as mobile phones, tablet computers and notebook computers is increasing, which makes the application technology of terminals have a very good market prospect and a good development momentum. In the process of wireless communication, the terminal often uses electromagnetic waves as the signal transmission carrier. Therefore, the radio frequency circuit occupies a very important position in the wireless communication of the terminal. The level of base station communication capability. [0003] In the existing technology, the integration of RF circuits in terminals is getting higher an...

AI Technical Summary

Problems solved by technology

Due to the circuit of the receiving path of the radio frequency circuit in the prior art such as figure 1 As shown, if RF engineers want to test the receiving channel insertion loss of the RF circuit, they need to disconnect the channel at the RF transceiver (WTR) and connect the front-end channel to the network analyzer for testing to obtain the channel insertion loss value, resulting in test The process takes a long time, and the process is cumbersome; and because there are many frequency bands in the receiving path, if you want to test the insertion loss of each frequency band in the receiving path, it will take too long and the feasibility is not high

Therefore, because the measurement method of the receiving path insertion loss in the prior art is too cumbersome, it is difficult to quickly and conveniently obtain the receiving path insertion loss, which virtually increases the difficulty of determining the problem points of the receiving path, making it time and time for RF engineers to discover the problem points of the receiving path Too much workload, resulting in low efficiency of RF debugging

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