Resonator filter with variable tuning

Wave transmission lines and networks – Plural channel systems – Having branched circuits

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

333174, 333175, 333202, 333235, 333207, H01P 120, H01P 1213

Patent

active

056275021

ABSTRACT:
An advantageous embodiment of the invention is the filter of the receiver branch of the duplex filter in a multi-channel radio transmitter/receiver having reception and transmission bands composed of plural radio-frequency channels. In the first state of the filter, when the radio transmitter/receiver is only receiving radio signals, the width of the pass band of the filter corresponds to said reception band. In the second state, in which the radio transmitter/receiver additionally transmits radio signals, the pass band of the filter is switched by current control to cover only part of the reception band. By constructing the filter in the manner proposed it is possible to use current control in the first resonator in the filter of the receiver branch. Because of its power consumption current control is otherwise unsuitable for use in e.g. the duplex filter of a portable radio-telephone.

REFERENCES:
patent: 3387886 (1968-06-01), Takalo et al.
patent: 3600708 (1971-08-01), King
patent: 3617954 (1971-11-01), Levy et al.
patent: 3733608 (1973-05-01), McGhay et al.
patent: 3815137 (1974-06-01), Kaegebein
patent: 4459571 (1984-07-01), Fraser
patent: 4682131 (1987-07-01), May
patent: 4799034 (1989-01-01), Siverman et al.
patent: 5227748 (1993-07-01), Sroka
The European Search Report --Abstract/Title/Figure --Date May 31, 1996.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Resonator filter with variable tuning does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Resonator filter with variable tuning, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resonator filter with variable tuning will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2135263

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.