| http://www.w3.org/ns/prov#value | - In designing a tunable bandpass filter (BPF) for use and application in electronic signal processing systems, such as, for example, communications systems, one must usually meet or exceed both out-of-band rejection and pass band insertion loss (I.L.) requirements as well as size, weight and other mechanical, environmental and electrical requirements imposed on fix-tuned BPF's.
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