Wave transmission lines and networks – Plural channel systems – Having branched circuits
Patent
1998-09-04
2000-08-01
Gensler, Paul
Wave transmission lines and networks
Plural channel systems
Having branched circuits
333161, 342375, H01P 118, H01P 512
Patent
active
06097267&
ABSTRACT:
The invention is a device that provides a phase-tunable antenna feed network that allows beam-steering and beam-width variation with simple actuation, at low cost, and with high rf performance. The device provides a series-feed where signal power splitters and phase-shifters are alternately disposed in series. Each phase-shifter consists of reflection-mode phase-shifter elements that operate in conjunction with an isolation device. This avoids the critical resonance condition between periodically aligned phase-shifters over the entire tuning range, since the isolation devices can easily be matched and/or aligned with non-resonant spacing. The main feed-line interconnections have the same impedance, thereby enabling the utilization of the same phase-shifter design for the entire network. Moreover, a common driving mechanism can be used for the phase-shifters to steer the antenna beam. Splitting the array into two sub-arrays with individual collective driving mechanism further allows beam-width variation by steering the beams of both sub-arrays in opposite directions. The device is further compatible with symmetrical series network designs that have better frequency response. The series feed network preferably uses a phase-shifter for shifting a signal propagating through a transmission line by moving a conductive construct between an active line and a ground plane of the transmission line. The conductive construct capacitively couples with either the active line and/or the ground plane, forming a capacitive shunt that reflects a significant part of the signal. The remaining portion of the signal is reflected at a terminated end of the transmission line, resulting in substantially no signal loss.
REFERENCES:
patent: 2897460 (1959-07-01), La Rosa
patent: 3081440 (1963-03-01), Augustine et al.
patent: 4602227 (1986-07-01), Clark et al.
patent: 5905462 (1999-05-01), Hampel et al.
patent: 5940030 (1999-08-01), Hampel et al.
Gensler Paul
Lucent Technologies - Inc.
LandOfFree
Phase-tunable antenna feed network does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Phase-tunable antenna feed network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase-tunable antenna feed network will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-667860