- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2019 Radiation and Scattering of Electromagnetic Waves (RSEMW) - Divnomorskoe, Russia (2019.6.24-2019.6.28)] 2019 Radiation and Scattering of Electromagnetic Waves (RSEMW) - Multitier Omnidirectional Antenna on The Circular Waveguide with The Paired Slots on The Tiers
摘要： This paper presents a recon?gurable aperture-fed patch antenna array for ±45? polarizations. First, a new method to realize the recon?gurable ±45? polarizations is proposed. It introduces controllable RF switches on a cross-aperture to excite a square patch for two orthogonal polarizations. The RF switches are controlled by two sets of DC biases, which could select the polarization through the recon?gurable aperture. Second, two patch antennas based on cross-aperture excitation are discussed. The ?rst structure uses a split ground plane with four switches, while the other one employs a united ground plane with eight switches. Both antennas operate well as the single element. However, only the antenna with a united ground is suitable for developing a recon?gurable dual-polarized antenna array, owning to its simple DC biasing lines and the recon?gurable-controlling network. Both simulation and experiment studies were examined to verify the proposed design. The measured 10-dB impedance bandwidth of the array is 9.3%, which can cover the 2.4-GHz WLAN band. The desired radiation patterns were observed with a maximum gain of 13.5 dBi. The proposed antenna array has low cross-polarization and stable gain across the entire operating bandwidth.
关键词： ±45? Polarization,Polarization recon?gurable antenna array,PIN diodes,aperture-fed patch antenna
更新于2025-09-16 10:30:52
-
A POLARIZATION RECONFIGURABLE MICROSTRIP ANTENNA EMPLOYING DUAL-PERTURBATION TECHNIQUE
摘要： This study presents a polarization recon?gurable antenna with frequency diversity function. The antenna incorporates a novel positive and negative perturbation technique to achieve di?erent polarization sense. A square shape slot is loaded on the ground plane to excite circular polarization by creating a negative perturbation. An L-shape segment is integrated to the patch using a switching diode. This segment creates a positive perturbation to eliminate the negative perturbation created by the defected ground slot, and the antenna excites linear polarization. Frequency diversity is achieved by exciting di?erent polarization senses at di?erent frequencies. A 3-dB axial ratio bandwidth of 1.41% is obtained for circular polarization radiation while the 10-dB impedance bandwidth during linear polarization is 1.8%. The antenna shows good radiation performances with high gain at both polarization states, and the performances are con?rmed experimentally.
关键词： polarization recon?gurable antenna,linear polarization,frequency diversity,circular polarization,positive and negative perturbation technique
更新于2025-09-09 09:28:46