Abstract
The efficacy of a simple, electrically small, low-profile, Huygens source antenna that radiates in its broadside direction is demonstrated numerically and experimentally. First, two types of electrically small, near-field resonant parasitic (NFRP) antennas are introduced and their individual radiation performance characteristics are discussed. The electric one is based on a modified Egyptian axe dipole NFRP element; the magnetic one is based on a capacitively loaded loop NFRP element. In both cases, the driven element is a simple coax-fed dipole antenna, and there is no ground plane. By organically combining these two elements, Huygens source antennas are obtained. A forward propagating demonstrator version was fabricated and tested. The experimental results are in good agreement with their analytical and simulated values. This low profile, ∼0.05λ0, and electrically small, ka = 0.645, prototype yielded a peak realized gain of 2.03 dBi in the broadside direction with a front-to-back ratio of 16.92 dB. A backward radiating version is also obtained; its simulated current distribution behavior is compared with that of the forward version to illustrate the design principles.
Original language | English (US) |
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Pages (from-to) | 4607-4617 |
Number of pages | 11 |
Journal | IEEE Transactions on Antennas and Propagation |
Volume | 64 |
Issue number | 11 |
DOIs | |
State | Published - Nov 2016 |
Keywords
- Broadside directivity
- Huygens source
- electrically small antennas (ESAs)
- low profile
- metamaterial-inspired structures
- near-field resonant parasitic (NFRP) antennas
ASJC Scopus subject areas
- Electrical and Electronic Engineering