scholarly journals A Novel Concentric Annular-Ring Slot Dual-Band Circularly Polarized Microstrip Antenna

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Yong Cheng ◽  
Hui Liu
Keyword(s):  
Microstrip Antenna ◽  
Simple Structure ◽  
Dual Band ◽  
Circularly Polarized ◽  
Annular Ring ◽  
Ism Band ◽  
Annular Slot ◽  
Circularly Polarized Radiation ◽  
Polarized Radiation

A simple structure concentric annular-ring slot dual-band circularly polarized (CP) microstrip antenna operating at ISM band (2.45 GHz) and 5G band (3.5 GHz) is proposed in this paper. The antenna achieves dual-band operation by digging two concentric annular-ring slots on the ground. And on the angular positions with 45 degrees inclined of each annular slot, two bent structures are loaded to generate circularly polarized radiation. The radiation of this antenna is bidirectional, and the directions of rotation are opposite. The measured results of the annular-ring slot microstrip antenna show good performance of dual-band circularly polarized characteristics.

Dual-Band Circularly Polarized Fractal Slit Boundary Microstrip Antenna for ISM Band Applications

2021 ◽  
Author(s):  
Prashanth Alle ◽  
Subhasish Pandav ◽  
Durga Prasad Mishra ◽  
Santanu Kumar Behera
Keyword(s):  
Microstrip Antenna ◽  
Dual Band ◽  
Circularly Polarized ◽  
Ism Band

scholarly journals A Slotted Single Feed Circularly Polarized Microstrip Patch Antenna with Suppressed Surface Wave Losses for WLAN Applications

2019 ◽  
Vol 9 (1S) ◽  
pp. 246-248
Keyword(s):  
Patch Antenna ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Microstrip Patch Antenna ◽  
Antenna Structure ◽  
Circularly Polarized ◽  
Microstrip Patch ◽  
Circular Patch Antenna ◽  
Circularly Polarized Radiation ◽  
Polarized Radiation

The circularly polarized microstrip antenna has been of great importance in WLAN applications. A circularly polarized slotted circular patch antenna with co-axial feed geometry has been designed to meet the requirements. The antenna designed has been slotted at several locations to make it radiate circularly polarized radiation. Two metallic cylindrical vias have been inserted near the two diametric ends of the slot to improve the realized gain of the antenna. The antenna structure is resonating at 6.4 GHz with 3dB axial ratio bandwidth of 200MHz and gain of 9.8dB has been observed.

Dual-band Circularly Polarized Aperture Coupled Annular-ring Microstrip Antenna for GNSS Applications

Frequenz ◽  
2014 ◽  
Vol 68 (1-2) ◽  
Author(s):  
Kang Ding ◽  
Tongbin Yu ◽  
Qiao Zhang ◽  
Kang Luo
Keyword(s):  
Microstrip Antenna ◽  
Dual Band ◽  
Circularly Polarized ◽  
Annular Ring

scholarly journals A Novel Dual-Broadband Circularly Polarized Patch Antenna for Precise Satellite Navigation

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Fumin Lin ◽  
Liangxian Zhang ◽  
Huiping Cai ◽  
Mingjian Liu ◽  
Xiaopeng Li ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Satellite Navigation ◽  
Capacitive Coupling ◽  
Dual Band ◽  
Gain Bandwidth ◽  
Circularly Polarized ◽  
Compact Antenna ◽  
Circularly Polarized Radiation ◽  
High Band ◽  
Polarized Radiation

This paper presents a novel dual-band circularly polarized patch antenna for precise satellite navigation. The radiation elements are composed of the inner cross-shaped patch and the outer annular patch which are printed on the same surface of one substrate. Two patches work in different bands, respectively, and emit dual-band circularly polarized radiation. In order to obtain a more compact antenna to meet the application of precise satellite navigation, we vertically place four metal cylinders under the ends of the cross-shaped patch to form four capacitive loadings to lower the resonant frequency of the inner cross-shaped patch. A capacitive coupling feed structure is used to match the input impedance of a patch antenna and make the antenna compact enough. The simulated and measured results show that the proposed antenna can produce appropriate dual-band circularly polarized radiation patterns for precise satellite navigation. The measured results of the antenna illustrate that maximum RHCP gain of the antenna is 4.72 dBi in the low band and 3.98 dBi in the high band, the 3 dB gain bandwidth is 70 MHz in the low band and 65 MHz in the high band.

scholarly journals A Dual-Band Dual-Polarized Omnidirectional Antenna

2020 ◽  
Vol 8 ◽  
Author(s):  
Hui Gu ◽  
Lei Ge ◽  
Jihong Zhang
Keyword(s):  
Axial Ratio ◽  
Dual Band ◽  
Impedance Bandwidth ◽  
Circularly Polarized ◽  
Circular Patch ◽  
Omnidirectional Antenna ◽  
Circularly Polarized Radiation ◽  
Dual Polarized ◽  
High Band ◽  
Polarized Radiation

A dual-band dual-polarized omnidirectional antenna is investigated. The two bands are generated by a lower circular patch and an upper circular patch, respectively. A set of conductive vias and a coupled ring are utilized to widen the antenna bandwidth. Curved branches are introduced to contribute to circularly polarized radiation. A prototype was designed, fabricated and measured to demonstrate the performance of the antenna. Measured results show that an overlapped bandwidth of 15% from 2.22 to 2.58 GHz for both S11 ≤ −10 dB and axial ratio ≤3 dB is obtained in the low band, and an impedance bandwidth of 11.1% from 5.63 to 6.29 GHz is achieved in the high band. Measured peak gains are approximately 4.3 dBic and 5.4 dBi at two bands. Moreover, omnidirectional radiation patterns are also obtained within the operating band.

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