Transmitter and/or receiver unit

Details Transmitter and/or receiver unit Transmitter and/or receiver unit

H - Electricity

04

K

325/3

H04K 1/00 (2006.01) H04B 1/713 (2006.01)

Patent

CA 2018854

Abstract Transmitter and/or Receiver Unit A frequency-hopping radio set is disclosed which in- cludes a variable attenuator connected ahead of the antenna and serving to suppress the spurious signals generated during frequency changes and transmit/re- ceive switching operations. In response to a control pulse, the attenuation provided by the attenuator rises from a small value to a large value and subse- quently falls back to the samll value, such that during each frequency change and each transmit/receive switching operation, the antenna is decoupled from the radio set. The rise and fall of the attenuation value have a soft profile. (Fig. 1) J. Baumann 4

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