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IEEE Transactions on Antennas and Propagation
Volume 48 Number 12, December 2000

A Low-Profile Conical Beam Loop Antenna with an Electromagnetically Coupled Feed System

Page 1864.

Abstract:

The radiation characteristics of a low-profile loop antenna are evaluated using the method of moments (MoM). The loop having a circumference of approximately two wavelengths is electromagnetically coupled to a bent feed line and radiates a circularly polarized conical beam. The frequency bandwidth for a 3-dB axial ratio criterion is calculated to be approximately 0.5% for an antenna height of h = 0.064 wavelengths. Over the same bandwidth, the input impedance is approximately 50 ohms and the gain is approximately 7 dB.

References

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