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Transmit-receive switching mechanism for TDD radio communication system

A technology of wireless communication system, transceiver switching, applied in the direction of transmission system, communication between multiple stations, transmission control/equalization, etc., can solve the problem of not taking into account the damage of the low noise amplifier, achieve small insertion loss, prevent The effect of self-oscillating

Inactive Publication Date: 2008-10-08
马瑞花 +5
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuit guarantees the linearity of the power signal, but the circuit does not take into account the damage to the low noise amplifier caused by the large signal that may exist in the antenna during the signal reception

Method used

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  • Transmit-receive switching mechanism for TDD radio communication system
  • Transmit-receive switching mechanism for TDD radio communication system
  • Transmit-receive switching mechanism for TDD radio communication system

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Embodiment Construction

[0024] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0025] figure 1 is a schematic diagram showing the connection of the transceiver switching circuit device 100 according to the present invention. refer to figure 1 , the transceiver switching device 100 includes a power amplifier 116, a low noise amplifier 102, and a circulator 106, wherein the power amplifier 116 is used to amplify the transmission signal of the wireless communication system to the required power, and the low noise amplifier 102 is used to amplify the antenna coupling Receive signal, and circulator 106 is used for the directional transmission of radio frequency signal, and its first port is connected to the output end of power amplifier 116, and t...

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Abstract

The present invention provides a receiving / transmitting switching device which is used for realizing the receiving / transmitting switching of the TDD wireless communication system. The receiving / transmitting switching device comprises a power amplifier, a low-noise amplifier and a circulator, and also comprises the following components: a quarter-wave microstrip which is used for impedance conversion and has a first end connected to the third port of the circulator and a second end connected to the input end of the low-noise amplifier; a first switching element which has a negative pole connected to the third port of the circulator and a positive pole connected to the first end of the inductor; a second switching element which has a negative pole connected to the second end of the quarter-wave microstrip and a negative pole earthed; a load resistor which absorbs the reflected wave of the transmitted signal and the leakage signal of the circulator and coverts to heat energy, wherein the first end of the load resistor is connected to the positive pole of the first switching element and the second end is earthed; and an inductor which operates a high resistance function to the radio frequency through the direct current bias thereby guaranteeing that the low-noise amplifier will not be damaged by the large signal at any working time.

Description

technical field [0001] The present invention relates to a time-division duplex wireless transceiver system in the field of communication, and more specifically, to a transceiver switching device for a time-division duplex (TDD) wireless communication system. Background technique [0002] In recent years, more and more wireless communication systems use time-division duplex systems, and due to the use of multi-carrier technology, the requirements for the linearity of devices on the transmit link are getting higher and higher, and the requirements for low noise in the receive link are also increasing. come higher. [0003] In the published Chinese patent No. 03141286.3 titled "Transmitting Linear Switch Circuit for Time Division Duplex Wireless Communication System and Its Implementation Method", a transceiver circuit composed of a three-terminal circulator and a radio frequency switch is disclosed. During transmission, the first port of the circulator sends the signal sent b...

Claims

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Application Information

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IPC IPC(8): H04B1/40H04B7/26H04B7/005H04B1/44
Inventor 文耀彤
Owner 马瑞花
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