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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - A Novel Frequency Reconfigurable Coupling Microstrip Patch Antenna
摘要： In this paper, a novel frequency reconfigurable coupling microstrip patch antenna is presented. A coplanar waveguide (CPW) feed line integrated on the ground plane is adopted in the structure to provide TM21 mode. Four PIN diodes are mounted on the patch gap to achieve frequency reconfiguration. By controlling the on-off state of PIN diodes electronically, resonant frequency points (5.75, 5.84, and 6.06 GHz) can be adjusted. What's more, a wide tunable range is achieved by loading more parasitic patch.
关键词： coplanar waveguide feed,coupling,Patch antenna,frequency reconfigurable
更新于2025-09-23 15:22:29
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Substrate integrated waveguide cavity backed frequency reconfigurable antenna for cognitive radio applies to internet of things applications
摘要： In this article, a new multiband frequency reconfigurable substrate integrated waveguide cavity slot antenna was designed using Computer Simulation Technology software tool for addressing the specific design challenges posed by the internet of things (IoT) based cognitive radio networks. Reconfiguration of frequency bands is achieved using PIN diodes. The antenna resonated at 2.624, 2.664, 2.720, 2.752, 4.304, 4.532, 4.556, 5.236, 5.304, 5.368, 5.332, and 5.392 GHz. The resonant frequency capability and radiation performance are demonstrated by both simulations and measurements. The simulated and measured results were in agreement. The higher efficiency, gain and average bandwidth obtained are 90%, 8.2 dBi and 65 MHz, respectively. The compactness, integrity, reliability, and performance at various operating frequencies make the proposed antenna a good candidate for IoT applications.
关键词： cognitive radio,frequency reconfigurable,PIN diodes,multiband,SIW,internet of things
更新于2025-09-12 10:27:22
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Design of a Frequency and Polarization Reconfigurable Patch Antenna With a Stable Gain
摘要： This paper presents a frequency and polarization reconfigurable patch antenna with a small gain variation. Eight discrete operating frequency bands can be achieved by properly switching shorting pins, and three polarization states, i.e., left-hand circularly polarization (LHCP), right-hand circularly polarization (RHCP) and linearly polarization (LP), can be realized simultaneously by adjusting perturbation segments. A stable gain performance is obtained within a wide reconfigurable frequency range, as well as all the reconfigurable polarization states, by utilizing the loss-character of p-i-n diodes when shorting pins are properly switched ON/OFF for different states. A prototype is designed, fabricated and measured. The simulated and measured results agree well. The experimental results show that the proposed antenna exhibits a simple reconfigurable network, a wide switching frequency range, a good element gain, and a small gain variation less than 1.8 dB across all the operating states.
关键词： Patch antenna,agile antenna,frequency reconfigurable,polarization reconfigurable
更新于2025-09-10 09:29:36