Communications: radio wave antennas – Antennas – Having electric space discharge device
Patent
1992-05-29
1995-03-28
Hajec, Donald
Communications: radio wave antennas
Antennas
Having electric space discharge device
333103, 343850, 343876, 455115, 327365, H01Q 126
Patent
active
054021332
ABSTRACT:
Synthesizer radiating systems providing efficient wideband operation incorporate a radiating element (20a), such as a loop, dipole or whip, which has dimensions which are small relative to wavelength in the radiated frequency band. Energy dissipation is substantially reduced by cycling stored energy back and forth between a radiating element (20a) having a first reactance and a storage element (22a) having the same or opposite reactance, in order to achieve energy efficiency along the lines of a narrowband tuned-circuit antenna. Wideband operation is achieved by synthesizing a representation of an input waveform (at 28) by actively controlling (30) solid-state switching devices (24), responsive to rate control and direction control parameters, which are interactive with the energy transferred between the opposite reactances. Higher efficiencies are achieved by bipolar circuits providing separate positive and negative energy transfer paths between a radiating element and a storage element. Systems as described provide relatively high radiated power levels with broadband operation and reduced power supply requirements, permitting provision of readily transportable units with small antennas for applications in which combinations of size, radiated power, bandwidth, power use and mobility are important.
REFERENCES:
patent: 3243728 (1966-03-01), Brainerd et al.
patent: 3641364 (1972-02-01), Rippel
patent: 4672686 (1987-06-01), Raoux et al.
Hajec Donald
Hazeltine Corporation
Onders E. A.
Robinson K. P.
Wigmore Steven P.
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