Radio-frequency circuit for wireless signal transceiver and related wireless signal transceiver

Abstract

The invention relates to a radio-frequency circuit for a wireless signal transceiver and a related wireless signal transceiver. The wireless signal transceiver receives a first wireless signal to be converted to a second wireless signal. The radio-frequency circuit comprises a transmission line with a first end and a second end, a receiving antenna coupled with the first end of the transmission line, a transmitting antenna coupled with the first end of the transmission line, a first filter circuit coupled with the second end of the transmission line and the wireless signal transceiver and a second filter circuit coupled with the second end of the transmission line and the wireless signal transceiver, wherein the receiving antenna receives the first wireless signal; the transmitting antenna transmits the second wireless signal; the first filter circuit filters out the first wireless signal; and the second filter circuit filters out the second wireless signal. By the first filter circuit and the second filter circuit, the radio-frequency circuit ensures the transceiving efficiency of the receiving antenna and the transmitting antenna and avoids the mutual interference of the signals. Accordingly, the radio-frequency circuit only needs a single transmission line to transmit satellite signals and frequency-modulated signals, avoiding the feeling of clutter, and increasing the convenience for use.

Description

technical field [0001] The invention relates to a radio frequency circuit for a wireless signal transceiver and its related wireless signal transceiver, in particular to a radio frequency circuit and its related wireless signal transceiver which can ensure the efficiency of antenna transmission and reception and avoid mutual interference of wireless signals. Background technique [0002] Satellite Radio (Satellite Radio) technology is the third generation of broadcasting after AM and FM broadcasting. It can solve the long-standing problem of difficult access to broadcasting stations through better spectrum utilization efficiency. At the same time, it has CD-like sound quality and additional Various functions of data services can also meet people's diversified needs for broadcast media. Therefore, satellite broadcasting tends to replace analog broadcasting. [0003] The related technologies (such as modulation and coding) used in the satellite broadcasting system are very di...

AI Technical Summary

Problems solved by technology

Such a design will not only cause a sense of clutter, but also easily cause inconvenience when using it.

If the transmission lines L_1 and L_2 are fixed or entangled, it may affect the effect of FM transmission

The main reason is that the current national communication management agencies (such as the U.S. Federal Communications Commission) have certain regulations on the transmission power of the FM frequency band; therefore, in the case of limited transmission power, the FM signal transmitted by the FM transmitting antenna 108 is very easy Interferenced so that the transmission lines L_1, L_2 cannot be fixed or tangled together

[0006] In short, the known vehicle satellite radio receiver needs at least two transmission lines to transmit the satellite signal and the FM signal, which will not only cause confusion, but also easily cause inconvenience during use.

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