Line-doubler delay circuit

Details Line-doubler delay circuit Line-doubler delay circuit

2007-05-29

2007-05-29

Takaoka, Dean (Department: 2817)

Wave transmission lines and networks

Plural channel systems

Having branched circuits

C333S112000, C333S138000

Reexamination Certificate

active

10947793

ABSTRACT:
The length of a transmission line delay circuit is halved by inserting a directional coupler in the signal path ahead of the transmission line and either open circuiting or short circuiting the other end of the transmission line. The signal traveling through the directional coupler and through the transmission line is reflected back at the end of the transmission line, and the reflected signal is carried to the coupled output of the directional coupler. Since the signal travels through the transmission line twice, the delay time is doubled. Therefore, for a given delay requirement, the length of transmission line required is only half of the length required for prior art transmission delay lines.

REFERENCES:
patent: 4827270 (1989-05-01), Udagawa et al.
patent: 6127889 (2000-10-01), Myer
patent: 6188373 (2001-02-01), Martek
patent: 6714072 (2004-03-01), Kenington

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