Microwave low-waveband ultra-minitype matching type PIN diode electrically-tuned attenuator

Abstract

The invention discloses a micro-wave low-band ultra-micro matching PIN diode electronically controlled attenuator, which is applied to various microwave systems such as radars, electronic countermeasure, communication and so on, and comprises a transmission line and a bias line led out from the transmission line, wherein a PIN diode is codirectionally connected at N nodes, which have an interval of one fourth wavelength and have the quantity of more than or equal to 2, with the transmission line respectively and then is earthed to ensure that the N PIN diodes are parallelly connected to the transmission line, the PIN diodes at both sides are serially connected with a 50ohm resistor respectively, and circuits are produced on a ceramic substrate. The circuit design achieves good standing wave property and flatter attenuation characteristic and can better improve the matching of input ports; the designed circuits of the electronically controlled attenuator with a micro-wave matching form are produced on the ceramic substrate; the circuits have good consistency, and the micro-wave low-band ultra-micro matching PIN diode electronically controlled attenuator has the advantages of high integration level, small volume, simple structure and so on.

Description

technical field [0001] The invention relates to an electrical adjustment attenuator applied in the field of microwave communication, in particular to an ultra-miniature matching type PIN diode electrical adjustment attenuator suitable for microwave low-band. Background technique [0002] Microwave ESC as a controller has been widely used in various microwave systems such as radar, electronic countermeasures, and communication. The attenuator generally attenuates the large voltage signal to a certain proportional multiple (generally refers to power attenuation) to achieve a safe or ideal level value, which is convenient for testing work, especially widely used in radio frequency and microwave. At present, most of the ESCs used in microwave systems are circuits composed of PIN diodes, generally in the form of external connections, with complex structures and large volumes, which are not conducive to circuit integration. From the perspective of standing wave characteristics, E...

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Problems solved by technology

Reflective ESCs reflect energy during attenuation, and the standing wave coefficient is very large, which increases with the increase of attenuation. The matching type has almost constant standing wave coefficient during the attenuation process, and its performance is stable, but it is more difficult to realize it

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