Research/Patents/US 4873501
US 4873501Tier 3 — General Defense

INTERNAL TRANSMISSION LINE FILTER ELEMENT

Assignee

US Government

Filed as: UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE NAVY THE

Filed

Jun 27, 1986

Granted

Oct 10, 1989

Location

San Diego CA (SAIC/General Dynamics)

Abstract

An improved transmission line filter element allows a higher difference between even and odd mode impedances than previously obtainable from planar structures. The filter element comprises a U-shaped gap formed in the strip conductor of a strip line transmission line, a microstrip structure or a suspended strip line structure. The internal transmission line filters can be cascaded to produce electromagnetic energy filters with deeper notches and steeper skirts than previously obtainable from other planar structures with the same number of elements.

Source: Google Patents

35 USC §181 Secrecy Order

Imposed

Nov 20, 1987

Rescinded

May 19, 1989

Duration

1 year, 6 months

Inventor

  • 1ALFRED R. HISLOP

Sensitive facility: San Diego CA (SAIC/General Dynamics)

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Back to patent indexSource: USPTO 35 USC §181 secrecy order records