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Passband filter having an asymmetrical filter response

  • US 6,462,631 B2
  • Filed: 02/14/2001
  • Issued: 10/08/2002
  • Est. Priority Date: 02/14/2001
  • Status: Expired due to Fees
First Claim
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1. A filter comprising:

  • an array of acoustic resonators which cooperate to establish a target passband of frequencies having a high frequency end and a low frequency end, said acoustic resonators being configured such that said target passband has an insertion loss profile in which a minimum insertion loss is located at least near said high frequency end of said target passband and a maximum insertion loss is located at least near said low frequency end of said target passband, said insertion loss profile within said target passband having a progressive decline from said minimum insertion loss to said maximum Insertion loss, said minimum insertion loss being substantially less than insertion toss at said low frequency end of said target passband.

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