Investigation of a Via-Loaded Microstrip Magnetic Dipole Antenna With Enhanced Bandwidth and Gain
| Autor: | Yuzhong Shi, Juhua Liu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Physics
business.industry Bandwidth (signal processing) 020206 networking & telecommunications 02 engineering and technology Microstrip law.invention Microstrip antenna Superposition principle Wavelength Optics law 0202 electrical engineering electronic engineering information engineering Dipole antenna Electrical and Electronic Engineering business Magnetic dipole Voltage |
| Zdroj: | IEEE Transactions on Antennas and Propagation. 67:4836-4841 |
| ISSN: | 1558-2221 0018-926X |
| DOI: | 10.1109/tap.2019.2913686 |
| Popis: | A via-loaded microstrip magnetic dipole antenna with enhanced bandwidth and gain is proposed and investigated. The antenna is constructed on a long microstrip antenna with three edges shorted and one edge opened. The open aperture is equivalent to a magnetic dipole, which serves as the radiation source. In the long cavity, two modes are generated, in which the lower one is half-TE110 mode and the higher one is half-TE310 mode. By loading two sets of shorting vias around the null voltage points of the half-TE310 mode, the resonant frequency of the half-TE110 mode is shifted upward. Then, the two modes are merged to achieve an enhanced bandwidth. Moreover, the superposition of the far fields of the two modes results in a narrowed unidirectional beam, a reduced sidelobe level (SLL), and therefore, an improved gain. The theoretical investigation is validated with simulation results. A prototype of the antenna is fabricated and measured. Measured results show that the proposed antenna with a low profile of $0.027\lambda _{0}$ ( $\lambda _{0}$ is the wavelength in free space) has an impedance bandwidth of 9.1%, and a peak gain of 10.2 dBi. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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