Wave transmission lines and networks – Coupling networks – Delay lines including long line elements
Patent
1989-01-17
1990-06-05
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Delay lines including long line elements
333139, 333164, H01P 118, H01P 308
Patent
active
049317539
ABSTRACT:
A time delay shifter imparts a constant time delay to an electromagnetic signal, preferably a signal at a microwave frequency, over a band of frequencies. The phase shift imparted to the signal is a linear function of frequency. The shifter comprises a finite number of delay units (1) each having four single-pole single-throw switches (11-14). Closure of the first and third switches (11, 13) causes the signal to traverse a first path (2) containing a preselected length of transmission line that imparts a fixed time delay to the signal. Closure of the second and fourth switches (12,14) causes the signal to traverse a minimum-delay path (3) which is shorter than the delay path (2). The paths (2,3) are fabricated of coplanar waveguide. Each switch (11-14) is resonated by an inductor (21-24) for purposes of increasing isolation. An attenuator (70) is inserted in each minimum-delay path (3).
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Dunn Vernon E.
Kennedy, II Andrew M.
Lesko Camille A.
Nelson William W.
Ford Aerospace Corporation
Ham Seung
LaRoche Eugene R.
Radlo Edward J.
Zerschling Keith L.
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