High-Gain Quad Array of Nonuniform Helical Antennas
Abstract
We present a design of a high-gain quad array of nonuniform helical antennas. The design is obtained by optimization of a 3-D numerical model of four nonuniform helical antennas placed above a ground plane, including a model of a feeding network, utilizing the method of moments with higher-order basis functions. The gain of one optimal nonuniform helical antenna can be about 2.5 dB higher than the gain of a uniform helical antenna of the same axial length. Creating a 2×2 array further increases the gain up to about 6 dB. The resulting quad array fits into a box whose dimensions are 2.5×3.3×3.3 wavelengths, and the gain in the main radiating direction is about 20.5 dBi in the frequency range from 0.9 GHz to 1.1 GHz. The design is verified by measurements of a prototype of the quad array.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 28, 2019
- Source ID
- 10.1155/2019/8421809
Entities
People
- Alenka Zajić
- Antonije R. Djordjević
- Dragan Olćan
- Jelena Dinkić
Organizations
- Defense Advanced Research Projects Agency
- Georgia Tech
- Serbian Academy of Sciences and Arts
- University of Belgrade