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A Single-Turn Stacked Spiral Antenna With Ultrawide Bandwidth and Compact Size
- Source :
- IEEE Transactions on Antennas and Propagation. 69:1740-1745
- Publication Year :
- 2021
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2021.
-
Abstract
- An ultrawideband stacked single-turn spiral antenna with an integrated feeding structure is presented in this communication. The proposed antenna consists of two stacked planar single-turn Archimedean spirals which are wound in orthogonal directions. By connecting these two stacked spirals through two vertical posts, the traveling-wave current path is lengthened and, hence, the operating frequency of Mode 1 is decreased. To reduce the feeding complexity, an integrated tapered microstrip line is used to feed the spiral, which also acts an impedance transformer. It is demonstrated that the proposed antenna can operate across 0.29–5 GHz with |S11| < −10 dB and 0.75–3.64 GHz with axial ratio (AR) < 3 dB. Compared with the single-turn Archimedean spiral with the same radius, the impedance and AR bandwidth of the proposed antenna are enhanced from 5:1 to 17:1 and from 1.6:1 to 4.9:1, respectively, showing that the proposed antenna can be a good candidate for ultrawideband applications.
- Subjects :
- Spiral antenna
Physics
Axial ratio
business.industry
Bandwidth (signal processing)
020206 networking & telecommunications
02 engineering and technology
Microstrip
Microstrip antenna
Optics
0202 electrical engineering, electronic engineering, information engineering
Electrical and Electronic Engineering
Antenna (radio)
business
Electrical impedance
Spiral
Subjects
Details
- ISSN :
- 15582221 and 0018926X
- Volume :
- 69
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Antennas and Propagation
- Accession number :
- edsair.doi...........e22f69e4b846ae54ad118241b75d3915