Accession Number:

AD0636518

Title:

HF TUNABLE FILTERS.

Descriptive Note:

Final rept.

Corporate Author:

AIRBORNE INSTRUMENTS LAB DEER PARK N Y

Report Date:

1966-05-01

Pagination or Media Count:

84.0

Abstract:

An investigation to advance the state of the art in narrow-band, high power 2 to 30 Mc filters resulted in the realization of the elliptic-function filter response using transmission-line techniques. An analysis performed on this program showed the elliptic-function filter to be of substantially lower loss than conventional filters with monotonic attenuation band characteristics. Curves were prepared, with the aid of a computer, relating the midband insertion loss to the other response characteristics for the elliptic function filter. Design equations are presented for the transmission-line resonators and coupling structures in the elliptic-function filter. Several experimental filters using helical resonators were constructed and evaluated with the measured results showing close agreement with theory. The lower loss characteristic of the elliptic-function filter as compared with conventional filters was verified experimentally. Various tuning techniques were evaluated and a capacitively tuned experimental model covered a one-octave frequency band with only a small increase in loss due to tuning. Author

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE