Reconfigurable Polarization Slot Antenna
It is demonstrated that by introducing a reconfigurable C-shaped slot in a circular patch antenna, the polarization of the radiation of the antenna, operating either in a linearly or circularly. Selvam, YogeshwariPanneer, et al. 'Novel frequency-and pattern-reconfigurable rhombic patch antenna with switchable polarization.' IEEE Antennas and Wireless Propagation Letter, vol.16, pp.1639-1642,2017. Rasool, Maryam, et al. 'A compact open complementary split ring resonator inspired triband reconfigurable coplanar waveguide fed antenna.' Polarization reconfigurable microstrip patch antenna is presented for 2.4–2.5 GHz wireless sensor network and WLAN applications. Dual feed degenerate mode patch is used as the starting point for ci. POLARIZATION RECONFIGURABLE SLOT ANTENNA FOR INDOOR MIMO SYSTEM Yue Li, Zhijun Zhang, Jianfeng Zheng, and Zhenghe Feng State Key Lab of Microwave and Communications, Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China; Corresponding author: zjzh@tsinghua.edu.cn Received 24 August 2010.
- Reconfigurable Polarization Slot Antenna Tuner
- Reconfigurable Polarization Slot Antenna Signal Booster
- Polarization Reconfigurable Eccentric Annular Ring Slot Antenna Design
A Polarization Reconfigurable Slot Antenna with a Novel Switchable Feeding Network
Abstract
A polarization reconfigurable slot antenna is proposed in this paper. The antenna consists of a microstrip line-to-slotline transition structure, two radiation slots and a switchable feeding network. The feeding network is a gradually changed ring slot with six switching diodes on it. By controlling the diodes states, the antenna can generate y-direction polarization, z-direction polarization, left-hand circular polarization and right-hand circular polarization. Detailed design considerations of the proposed antenna, simulated and measured results are presented and discussed. Measured results agree well with simulated. The results proved that the antenna can realize polarization reconfiguration effectively at 5 GHz.
- slot antenna;
- polarization;
- reconfigurable;
- PIN diodes
Reconfigurability is a vital feature of future agile millimeter wave systems for sensing, imaging, wireless, and satellite communications. Reconfigurable antennas are an integral part of such systems as they can control polarization, frequency, radiation pattern, or characteristic impedance.
Paraffin-Based Reconfigurable Components at Millimeter Wave
Figure 1: Multiphysiscs simulation results for Von Mises stress and temperature distribution of the paraffin PCM actuator for input voltage of 2 V.
The main goal of this project is to design low-loss millimeter wave (mmW) RF components using novel materials such as paraffin. Alkane or paraffin is an organic phase change material (PCM) that exhibits low a dielectric loss, (tanδ=6.6E-4 at 110 GHz), with a relative dielectric constant of 2.26. Paraffin is also a mechanical PCM that undergoes a 15% volumetric change through its solid-liquid phase change.
Due to its unique electrical and mechanical properties, paraffin PCM variable capacitors are very attractive for designing reconfigurable antennas and distributed loaded line phase shifters at mmW band.
Figure 2: Micrograph of the fabricated reconfigurable antenna.
In our group, we have developed a continuously reconfigurable antenna at 100 GHz by monolithically integrating the paraffin PCM capacitors with a slot antenna. Designed antenna has a reconfiguration range of 96–102.2 GHz with a maximum gain of 3 dBi. (Figures 1—2)
Reconfigurable Polarization Slot Antenna Tuner
In addition, we have also developed a distributed loaded line phase shifter based on a new class of electro-thermally actuated RF MEMS devices using paraffin PCM. Designed phase shifter has a figure-of merit of 71.8°/dB achieved while maintaining a return loss more than 12 dB.
Figure 3: Multiphysiscs simulation results for Von Mises stress and temperature distribution of the paraffin PCM actuator for input voltage of 5 V. Designed phase shifter has a maximum insertion loss of 5 dB for a 360° of phase shift. (Figure 3)© Prof. Nima Ghalichechian's Group
Related Papers
Reconfigurable Polarization Slot Antenna Signal Booster
B. Ghassemiparvin and N. Ghalichechian, “Reconfigurable Millimeter-wave Antennas using Paraffin Phase Change Materials,” European Conference on Antennas and Propagation (EuCAP), Davos, Switzerland, 10-15 Apr, 2016. DOI:https://doi.org/10.1109/EuCAP.2016.7481595 (Download PDF)
Polarization Reconfigurable Eccentric Annular Ring Slot Antenna Design
B. Ghassemiparvin and N. Ghalichechian, “Novel Paraffin-Based 100-GHz Variable Capacitors for Reconfigurable Antennas,' European Conference on Antennas and Propogation (EuCAP), Paris, France, 19-24 Mar, 2017.DOI:https://doi.org/10.23919/EuCAP.2017.7928379(Download PDF)
B. Ghassemiparvin and N. Ghalichechian, 'W-Band True-Time Delay Phase Shifters Using Paraffin Microactuators,' European Conference on Antennas and Propogation (EuCAP), London, UK, 9-13 Apr, 2018.