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Self-adaptive frequency band-pass filtering device in microwave signal transceiver

  • US 7,082,294 B2
  • Filed: 06/12/2001
  • Issued: 07/25/2006
  • Est. Priority Date: 06/26/2000
  • Status: Expired due to Term
First Claim
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1. A receiving device in a microwave signal transmitter/receiver or receiver, the receiving device including a microwave signal receiving antenna connected to the input of a low-noise amplifier through a self adaptive band pass filtering device comprises, at least one filtering means having at least two different frequency bands and, means for selecting one of the frequency bands depending on the frequency of the signal to be received, a mixer that receives the output signal of the low-noise amplifier and the signal from a frequency synthesizer, wherein said means for selecting comprise switches which are triggered by a control means associated with the frequency synthesizer.

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