Dual-Band Annular Slot Antenna Loaded by Reactive Components for Dual-Sense Circular Polarization With Flexible Frequency Ratio

This paper proposes a new design of dual-band reactively loaded annular slot antenna for dual-sense circular polarization radiation. Two concentric annular slots excited by a common microstrip feedline are employed to realize dual-band operation. Each slot can radiate a circularly polarized (CP) wave with a specified sense at its one or one-and-a-half wavelength resonance, given that an appropriately valued reactive component, i.e., capacitor or inductor, is introduced at a pre-determined location. A small frequency ratio (FR) can be achieved between the two oppositely sensed CP bands when a capacitor and an inductor are loaded, respectively, onto the inner and outer annular slots. Contrarily, two oppositely sensed CP bands that possess a large FR can be yielded when an inductor and a capacitor are loaded onto the inner and outer annular slots, respectively. For experimental verification, two antenna prototypes with FRs of 1.63 and 2.41 have been designed, fabricated, and measured. The measurement results exhibit a good agreement with the simulated ones. Details of design concerns and experimental results are presented and discussed.

[1]  Xianming Qing,et al.  A Compact Circularly Polarized Slotted Patch Antenna for GNSS Applications , 2014, IEEE Transactions on Antennas and Propagation.

[2]  Hang Li,et al.  Quad-Band Probe-Fed Stacked Annular Patch Antenna for GNSS Applications , 2014, IEEE Antennas and Wireless Propagation Letters.

[3]  E. Yung,et al.  Dual-Band Dual-Sense Circularly-Polarized CPW-Fed Slot Antenna With Two Spiral Slots Loaded , 2009, IEEE Transactions on Antennas and Propagation.

[4]  Zhangyou Chen,et al.  A Design of Dual-Frequency Dual-Sense Circularly-Polarized Slot Antenna , 2012, IEEE Transactions on Antennas and Propagation.

[5]  Kin‐Lu Wong,et al.  Printed ring slot antenna for circular polarization , 2002 .

[6]  Kai-Fong Lee,et al.  Wideband Circularly Polarized Antenna With L-Shaped Slot , 2008, IEEE Transactions on Antennas and Propagation.

[7]  Qing Huo Liu,et al.  Dual-band capacitively loaded annular-ring slot antenna for dual-sense circular polarization , 2017 .

[8]  Qing Huo Liu,et al.  Microstrip-line-fed reactively loaded circularly polarized annular-ring slot antenna , 2017 .

[9]  Miguel Ferrando-Rocher,et al.  Single-Layer Circularly-Polarized $Ka$ -Band Antenna Using Gap Waveguide Technology , 2018, IEEE Transactions on Antennas and Propagation.

[10]  Xiulong Bao,et al.  Dual-Frequency Dual-Sense Circularly-Polarized Slot Antenna Fed by Microstrip Line , 2008, IEEE Transactions on Antennas and Propagation.

[11]  M. Ammann,et al.  Monofilar Spiral Slot Antenna for Dual-Frequency Dual-Sense Circular Polarization , 2011, IEEE Transactions on Antennas and Propagation.

[12]  Malathi Kanagasabai,et al.  A Fractal-Based Circularly Polarized UHF RFID Reader Antenna , 2014, IEEE Antennas and Wireless Propagation Letters.

[13]  Chow-Yen-Desmond Sim,et al.  Polarization Reconfigurable Eccentric Annular Ring Slot Antenna Design , 2015, IEEE Transactions on Antennas and Propagation.

[14]  Fan Zhang,et al.  Dual-Band Dual-Sense Circularly Polarized Slot Antenna With a C-Shaped Grounded Strip , 2011, IEEE Antennas and Wireless Propagation Letters.

[15]  Son Xuat Ta,et al.  Circularly Polarized Crossed Dipole on an HIS for 2.4/5.2/5.8-GHz WLAN Applications , 2013, IEEE Antennas and Wireless Propagation Letters.

[16]  Tsair-Rong Chen,et al.  Dual-Band Ring Slot Antenna with Circular Polarization , 2013 .

[17]  Richard W. Ziolkowski,et al.  28 GHz Compact Omnidirectional Circularly Polarized Antenna for Device-to-Device Communications in the Future 5G Systems , 2017, IEEE Transactions on Antennas and Propagation.