A Printed Inverted-F Antenna for Dual-Band Dual-Sense Circular Polarization

2018 ◽  
Author(s):  
Keigo Shimizu ◽  
Takafumi Fujimoto
Keyword(s):  
Circular Polarization ◽  
Dual Band

scholarly journals High-Efficiency Polarizer Reflectarray Antennas for Data Transmission Links from a CubeSat

Electronics ◽  
2021 ◽  
Vol 10 (15) ◽  
pp. 1802
Author(s):  
Eduardo Martinez-de-Rioja ◽  
Daniel Martinez-de-Rioja ◽  
Rafael López-Sáez ◽  
Ignacio Linares ◽  
Jose A. Encinar
Keyword(s):  
Circular Polarization ◽  
Data Transmission ◽  
High Efficiency ◽  
High Gain ◽  
Dual Band ◽  
Left Handed ◽  
Linearly Polarized ◽  
Flat Profile ◽  
First Time ◽  
Collimated Beam

This paper presents two designs of high-efficiency polarizer reflectarray antennas able to generate a collimated beam in dual-circular polarization using a linearly polarized feed, with application to high-gain antennas for data transmission links from a Cubesat. First, an 18 cm × 18 cm polarizer reflectarray operating in the 17.2–22.7 GHz band has been designed, fabricated, and tested. The measurements of the prototype show an aperture efficiency of 52.7% for right-handed circular polarization (RHCP) and 57.3% for left-handed circular polarization (LHCP), both values higher than those previously reported in related works. Then, a dual-band polarizer reflectarray is presented for the first time, which operates in dual-CP in the frequency bands of 20 GHz and 30 GHz. The proposed antenna technology enables a reduction of the complexity and cost of the feed chain to operate in dual-CP, as a linear-to-circular polarizer is no longer required. This property, combined with the lightweight, flat profile and low fabrication cost of printed reflectarrays, makes the proposed antennas good candidates for Cubesat applications.

A DUAL-MODE APERATURE-COUPLED STACK ANTENNA FOR WLAN DUAL-BAND AND CIRCULAR POLARIZATION APPLICATIONS

2010 ◽  
Vol 17 ◽  
pp. 193-202 ◽  
Author(s):  
Ji-Chyun Liu ◽  
Bing-Hao Zeng ◽  
Chin-Yen Liu ◽  
Hui-Chi Wu ◽  
Chung-Chi Chang
Keyword(s):  
Circular Polarization ◽  
Dual Band ◽  
Dual Mode

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.

Compact e-shape metasurface with dual-band circular polarization conversion

2016 ◽  
Vol 381 ◽  
pp. 48-55 ◽  
Author(s):  
Hailin Cao ◽  
Xiaodong Wu ◽  
Zhoujian Chen ◽  
Chengzhuo Zhu ◽  
Xiaoheng Tan ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Dual Band ◽  
Polarization Conversion

scholarly journals Dual-Wide-Band Dual Polarization Terahertz Linear to Circular Polarization Converters based on Bi-Layered Transmissive Metasurfaces

Electronics ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 869 ◽  
Author(s):  
Ayesha Kosar Fahad ◽  
Cunjun Ruan ◽  
Kanglong Chen
Keyword(s):  
Circular Polarization ◽  
Wide Band ◽  
Dual Band ◽  
Geometrical Parameters ◽  
Fractional Bandwidth ◽  
Validity And Reliability ◽  
Dual Polarization ◽  
High Frequency Structure Simulator ◽  
Outer Conductor ◽  
The Impact

Transmissive metasurface-based dual-wide-band dual circular polarized operation is needed to facilitate volume and size reduction along with polarization diversity for future THz wireless communication. In this paper, a novel dual-wide-band THz linear polarization to circular polarization (LP-to-CP) converter is proposed using transmissive metasurfaces. It converts incident X polarized waves into transmitted left-hand circular polarized (LHCP) and right-hand circular polarized (RHCP) waves at two frequency bands. The structure consists of bi-layered metasurfaces having an outer conductor square ring and three inner conductor squares diagonally intersecting each other. The proposed converter works equally well with incident Y polarizations. Operational bandwidths for the dual-band LP-to-CP are 1.16 THz to 1.634 THz (34% fractional bandwidth) and 3.935 THz to 5.29 THz (29% fractional bandwidth). The electromagnetic simulation was carried out in two industry-standard software packages, High Frequency Structure Simulator (HFSS) and Computer Simulation Technology (CST), using frequency and time domain solvers respectively. Close agreement between results depicts the validity and reliability of the proposed design. The idea is supported by equivalent circuits and physical mechanisms involved in the dual-wide-band dual polarization operation. The impact of different geometrical parameters of the unit cell on the performance of LP-to-CP operation is also investigated.

Dual-Band Reflectarray to Generate Two Spaced Beams in Orthogonal Circular Polarization by Variable Rotation Technique

2020 ◽  
Vol 68 (6) ◽  
pp. 4617-4626 ◽  
Author(s):  
Daniel Martinez-de-Rioja ◽  
Rafael Florencio ◽  
Eduardo Martinez-de-Rioja ◽  
Manuel Arrebola ◽  
Jose A. Encinar ◽  
...  
Keyword(s):  
Circular Polarization ◽  
Dual Band ◽  
Rotation Technique

Polarization Reconfigurable Dual-Band Rectangular Slot Antenna

Frequenz ◽  
2019 ◽  
Vol 73 (9-10) ◽  
pp. 339-351
Author(s):  
Rohit Kumar Saini
Keyword(s):  
Circular Polarization ◽  
Linear Polarization ◽  
Dual Band ◽  
Slot Antenna ◽  
Pin Diodes ◽  
Rectangular Slot ◽  
Left Hand ◽  
Right Hand ◽  
Lower Band ◽  
The Senses

Abstract A novel dual-band rectangular slot antenna is presented for dual-sense reconfigurable polarization. A W-shaped microstrip feedline and two rectangular parasitic patches are used to obtain dual-band circular polarization. Further, the feedline is modified so that the senses of polarization at the two bands are opposite. By introducing PIN-diodes in the feed lines, polarization can be switched among left-hand circular polarization (LHCP), right-hand circular polarization (RHCP), and linear polarization (LP). A prototype dual-band dual-sense antenna with f01 = 1.9 GHz and f02 = 3.45 GHz is fabricated in a 1.6 mm thick FR4 substrate. The measured circular polarized bandwidths are more than 7.6 % for the lower band and 5 % for the upper band.

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