scholarly journals A Thin and Broadband Linear-to-Circular Polarizer Based on Grid-Patch Structure for Ku-Band

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Hao-ming Hu ◽  
Dong-fang Zhou ◽  
Xue Lei ◽  
Jun-mo Wu
Keyword(s):  
Numerical Simulations ◽  
Circular Polarization ◽  
Model Theory ◽  
Oblique Incidence ◽  
Incidence Angle ◽  
Equivalent Circuit Model ◽  
Axial Ratio ◽  
Patch Structure ◽  
Circular Polarizer ◽  
Ku Band

A three-layer circular polarization selective surface operating in Ku-band is proposed in this communication. We design a thin grid-patch structure to achieve linear-to-circular polarization transformation over a wide frequency band. The periodic structure could be analyzed via equivalent circuit model theory. Numerical simulations have been carried out and the prototype structures have been fabricated and experimentally validated. The axial ratio (AR) of the transmitted field remained below 3 dB over the entire bandwidth, and the 3 dB AR bandwidth is approximately 44.6%. The design has a subwavelength thickness of 6 mm (0.28λc). Besides, this design could be also applied to beam scanning antennas because of its capability in condition of large oblique incidence angle (±50 deg).

scholarly journals Low Loss Transmission Circular Polarizer for KU Band Application

2018 ◽  
Vol 1 (1) ◽  
pp. 28-33
Author(s):  
Farman Ali Mangi
Keyword(s):  
Circular Polarization ◽  
Transmission Loss ◽  
Low Loss ◽  
New Techniques ◽  
Resonant Frequencies ◽  
Circular Polarizer ◽  
Left Handed ◽  
Distinct Frequency ◽  
The Right ◽  
Ku Band

Low loss transmission circular polarizer is proposed for Ku band applications. The designed structure consists of two closely cross metallic strips which are based on FSS for 15.25 GHz and 15.28 GHz applications. The right hand circular polarization (RHCP) and left handed circular polarization (LHCP) are obtained at 15.25 GHz and at 15.28 GHz. The transmission loss through polarizer is important issue for high frequency applications. Due to transmission loss, new techniques are required to reduce the transmission loss of transmitted wave and achieve perfect circular polarization. Meanwhile, low loss transmission has been achieved by using dual layer of strips to obtain perfect circular polarization at certain mentioned resonant frequencies. Theoretically, it is found that the outgoing waves through polarizer are perfect circular polarization at the distinct frequency ranges.

scholarly journals Single Feed Aperture-Coupled Wideband Dielectric Resonator Antenna with Circular Polarization for Ku-Band Applications

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Joshua M. Patin ◽  
Satish K. Sharma
Keyword(s):  
Circular Polarization ◽  
Dielectric Resonator ◽  
Ground Plane ◽  
Axial Ratio ◽  
Resonant Mode ◽  
Center Frequency ◽  
Back Side ◽  
Dielectric Resonator Antenna ◽  
Band Frequency ◽  
Ku Band

A novel single feed aperture-coupled wideband dielectric resonator antenna (DRA) exhibiting righ-handed circular polarization (RHCP) operating in the Ku-band frequency range is presented. The aperture-coupled single feed design utilizes back-side microstrip excitation through a novel bow-tie-shaped cross-slots in the ground plane. Extensive simulation parametric studies resulted in a 3 dB axial ratio (AR) bandwidth of 17.24% at a center frequency of 13 GHz, where the dielectric resonator is excited in its HEM11δresonant mode. A prototype DRA was fabricated with some limitations and experimentally verified for the impedance matching and radiation patterns showing circular polarization.

scholarly journals Analysis of Reconfigurable Asymmetric Corner ARC Slotted Patch Antenna for Ultrawide and KU Band Application

2020 ◽  
Vol 9 (4) ◽  
pp. 1105-1110
Keyword(s):  
Patch Antenna ◽  
Ground Plane ◽  
Equivalent Circuit Model ◽  
Axial Ratio ◽  
Wide Band ◽  
Experimental Result ◽  
Impedance Bandwidth ◽  
Rectangular Slot ◽  
Good Agreement ◽  
Ku Band

A reconfigurable asymmetric patch antenna with arced corners loaded with a rectangular slot and a T slot on the partial ground used for UWB and Ku band applications. The discussion is carried out into three segments. In the first segment, the design of patch antenna proposed asymmetric arcs at the corner, two side slits, and one slot in the middle of the patch while a T-slot integrated on the partial ground plane. This presented antenna covers an impedance bandwidth ranging from 3.0 GHz to 16.2GHz with a fractional amount of 132%. It is found that a wide band of 3.0 GHz to 10.7 GHz is achieved by using a T-slot on the partial ground plane with a normal rectangular patch while 10.8 GHz to 16.2 GHz is attained by using two corners arcs with two small slits on the patch. The experimental result shows good agreement of 3-dB axial ratio bandwidth and radiation characteristics with the simulated result of the proposed antenna. The second segment proposes an extracted equivalent circuit model for patch and ground plane of corner arc monopole antenna using EM software package in the ADS platform and made a good agreement with the proposed antenna. Finally in the third segment RF PIN diode is embedded in a rectangular slot of the patch which achieves desired frequency shifting in the required band of operation.

A Broadband Circularly Polarized Cross-slotted Patch Antenna with Horizontal Meandered Strip (HMS)

Frequenz ◽  
2020 ◽  
Vol 74 (5-6) ◽  
pp. 191-199
Author(s):  
M. K. Verma ◽  
Binod K. Kanaujia ◽  
J. P. Saini ◽  
Padam S. Saini
Keyword(s):  
Circular Polarization ◽  
Patch Antenna ◽  
Impedance Matching ◽  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Radiation Patterns ◽  
Circularly Polarized ◽  
Feeding Technique

AbstractA broadband circularly polarized slotted square patch antenna with horizontal meandered strip (HMS) is presented and studied. The HMS feeding technique provides the good impedance matching and broadside symmetrical radiation patterns. A set of cross asymmetrical slots are etched on the radiating patch to realize the circular polarization. An electrically small stub is added on the edge of the antenna for further improvement in performance. Measured 10-dB impedance bandwidth (IBW) and 3-dB axial ratio bandwidth (ARBW) of the proposed antenna are 32.31 % (3.14–4.35 GHz) and 20.91 % (3.34–4.12 GHz), respectively. The gain of the antenna is varied from 3.5 to 4.86dBi within 3-dB ARBW. Measured results matched well with the simulated results.

Dual-layered polarization and frequency reconfigurable microstrip antenna by rotating breach-truncated circular radiator

2017 ◽  
Vol 9 (8) ◽  
pp. 1705-1712
Author(s):  
Haixiong Li ◽  
Yunlong Gong ◽  
Jiakai Zhang ◽  
Jun Ding ◽  
Chenjiang Guo
Keyword(s):  
Reflection Coefficient ◽  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Axial Rotation ◽  
Polarization Characteristic ◽  
The Novel ◽  
Test Results ◽  
Left Handed ◽  
Mechanical Rotation

In this study, a dual-layered polarization and frequency reconfigurable microstrip antenna is proposed based on sequential mechanical axial rotation of the circular metal radiator. The antenna can be reconfigured among three different polarized modes, including the linear polarization (LP), left-handed circular polarization and right-handed circular polarization in the band from 4.68 to 4.80 GHz (2.53%). The resonance frequency of the proposed antenna with the same LP mode could also be tuned in the range from 4.70 to 5.03 GHz by mechanical rotation of the breach-truncated circular metal radiator as well as the circular substrate. Furthermore, the polarization characteristic and frequency can be reconfigured, respectively, as the circular radiator is taken an axial rotation with an angle of 360°. The presented antenna in the four different states has been numerically simulated and fabricated for the experimental measurement, the investigated characteristics includes the port reflection coefficient, axial ratio, radiation pattern, gain, and the radiation efficiency. The simulated and test results agreed well with each other. This antenna enriches the novel mechanical reconfigurable method except for the popular electrical approach.

Reconfigurable Frequency Textile Antenna with Circular Polarization Using Slotted Technique

2015 ◽  
Vol 781 ◽  
pp. 81-84 ◽  
Author(s):  
Shakhirul Mat Salleh ◽  
Muzammil Jusoh ◽  
Abdul Hafiizh Ismail ◽  
Muhammad Ramlee Kamarudin ◽  
Mohamad Imran Ahmad ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Axial Ratio ◽  
Dual Band ◽  
Operating Frequency ◽  
Pin Diode ◽  
Switching Element ◽  
Band Frequency ◽  
Microstrip Patch ◽  
Textile Antenna

This paper presents a reconfigurable frequency microstrip patch textile antenna using slotted technique. The switchable frequency is achieved by implementing three PIN diode switches at the slotted ground of the antenna. It is discovered that the switching element is capable to configure the frequency at six different states of operating frequencies between 1.575 GHz until 2.45 GHz. With certain switches configuration, the antenna is proficient to produce a dual-band frequency of band 1; 1.575 GHz and 2.45 GHz and band 2; 1.588 GHz and 2.36 GHz. Besides, the antenna has successfully perform an axial ratio of less than <3 dB at the GPS operating frequency of 1.575 GHz. A shieldit super is used for the antenna radiator and felt fabric as the antenna substrate. The design and simulated result shows that the presented antenna is potential to be implemented in GPS and Wi-Fi applications.

DESIGN OF LINEAR AND CIRCULAR POLARIZED ANTENNA FOR WLAN APPLICATION

2016 ◽  
Vol 78 (6-5) ◽  
Author(s):  
Hamizan Abu Bakar ◽  
Mohamad Zoinol Abidin Abd. Aziz ◽  
Badrul Hisham Ahmad ◽  
Azahari Salleh ◽  
Suhana Ghani ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Axial Ratio ◽  
Local Area ◽  
Area Network ◽  
Rectangular Slot ◽  
Rectangular Patch ◽  
Left Handed ◽  
Circular Notch

In this paper, a linear and circular polarized antenna with operating frequency at 2.4 GHz for Wireless Local Area Network (WLAN) application is proposed. Firstly, a basic linear polarization antenna (Design A) was designed with rectangular slot at the rectangular patch and air gap between substrate and copper layer with distance of 10 mm. Next, in order to perform circular polarized, the antenna designed is added with optimized dual circular notch at the rectangular slot. This circular polarized antenna is designed with two different polarization types which are right-handed circular polarization (RHCP) with optimized dual circular notch at the patch (Design B) and left-handed circular polarization (LHCP) with optimized dual circular notch at the patch (Design C). The proposed antenna had been designed and simulated by using Computer Simulation Technology (CST) Microwave Studio Suite. The comparison result of simulation and measurement show that the proposed antenna can achieve axial ratio above 3 dB for linear polarized and below 3 dB for circular polarized with return loss less than -10 dB.

scholarly journals Circular polarization reconfigurable antenna for mid-band 5G applications with a new reconfigurable technique

2020 ◽  
Vol 19 (2) ◽  
pp. 802
Author(s):  
Alaa Imran AL-Muttairi ◽  
Malik Jasim Farhan
Keyword(s):  
Resonant Frequency ◽  
Circular Polarization ◽  
Low Cost ◽  
Axial Ratio ◽  
Maximum Size ◽  
Impedance Bandwidth ◽  
Reconfigurable Antenna ◽  
Commercial Software ◽  
Innovative Technique

In this paper, a novel low cost, single-feed, and circular polarization reconfigurable antenna is designed and fabricated for future mid-band 5G applications. An innovative technique is used in this approach, which combines three techniques, namely: polygon U-slot, switchable vertical or horizontal slots, and shorting posts. The proposed antenna can alter its polarization sense between RHCP and LHCP with the ability to adjust the axial ratio position with respect to frequency along the impedance bandwidth of the antenna. The antenna is built on RT/duroid 5880 substrate with a maximum size of (31*31*3.15) .Two real diodes are integrated across the slot to change polarization sense. CST commercial software is used to simulate the antenna, and then it is fabricated and measured practically. Good agreements between the two results are achieved. However, The antenna has impedance bandwidth starting from 3.4995GHz to 3.73GHz with overlapped axial ratio bandwidth of 2.1% for both operation senses. Also, the antenna has good gain, and it has one resonant frequency at 3.6GHz for both operating states.

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