Carrier frequency communication transmission system having premo

Details Carrier frequency communication transmission system having premo Carrier frequency communication transmission system having premo

1978-06-16

1982-03-16

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333133, 333186, H03H 946, H03H 950, H03H 970

Patent

active

043203663

ABSTRACT:
A carrier frequency communication transmission system has a premodulation band above the transmission position of the base primary group of 60-108 kHz and utilizes mechanical filters as channel filters and also a common group filter in order to filter out the primary group band. Bending resonators having longitudinal coupling are utilized as the mechanical filters. The frequency range of the premodulation band at its lower limit is determined by a frequency spacing of at least 4 kHz from the upper band limit of the primary group band and the upper limit of the frequency range is determined in that the interfering natural oscillations, inasmuch as they occur in the lower stop band of the channel filter, lie at least 12 kHz below the lower limit of the primary group band. Highly stabilized piezo ceramics is used as the electromechanical transducer material.

REFERENCES:
patent: 3495188 (1970-02-01), Kopp
patent: 3577180 (1971-05-01), Albsmeier et al.
patent: 3931600 (1976-01-01), Nagashima et al.
patent: 4124829 (1978-11-01), Kuenemund
Borner-"Mechanische Filter fur die Tragerfrequentztechnik", NTF, 19, 1960; pp. 34-37.

Affiliated with

Also associated with

Rating

Carrier frequency communication transmission system having premo does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Carrier frequency communication transmission system having premo, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carrier frequency communication transmission system having premo will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1644071