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An isoflux helix antenna has been developed for a higher edge of coverage gain than any previous design. The design is fit for space use in terms of thermal and structural performance. Excellent agreement with the predicted radiation pattern has been proven with measurements.
Analyses on the diameter of the ground plane of helical antennas show that, when the diameter of this plane is slightly smaller than the one of the helix itself, backfire radiation is achieved. Considering this ground plane as a director, the addition of more ground planes - or directors - is proven to increase the directivity of the antenna. With these reduced ground planes not causing any blockage...
Analyses on the diameter of the ground plane of helical antennas show that, when the diameter of this plane is slightly smaller than the one of the helix itself, backfire radiation is achieved. Considering this ground plane as a director, the addition of more ground planes - or directors - is proven to increase the directivity of the antenna. With these reduced ground planes not causing any blockage...
High power wideband helical antennas are currently being designed, simulated, and constructed at the University of Missouri-Columbia's Center for Physical and Power Electronics laboratory. The program CST Microwave Studio was used to simulate antenna designs derived from Krauss's formulas. Once simulations proved to be functional, the antennas were constructed, characterized, and compared against...
A chip monopole antenna with a parasitic patch is proposed for GPS applications. To reduce the dimensions of the antenna, the chip monopole antenna is composed of stacked meander, helix structures, and a parasitic patch. The impedance and radiation characteristics of the antenna are investigated. The measured results show that the proposed antenna, having compact dimensions of 3.6 ?? 5 ?? 1.3 mm,...
This paper proposes a new type of radiating structure based on confined planar helix (CPH). The structure supports surface waves and radiates in end fire direction with a small side lobe in the backfire direction. The paper describes the configuration of the radiating structure and presents simulated as well as measured radiation patterns.
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