Dual-Band Magnetic Loop Antenna with Monopolar Radiation Using Slot-Loaded Composite Right/Left-Handed Structures

2012 ◽  
Vol E95-B (2) ◽  
pp. 627-630
Author(s):  
Seongmin PYO ◽  
Min-Jae LEE ◽  
Kyoung-Joo LEE ◽  
Young-Sik KIM
Keyword(s):  
Magnetic Loop ◽  
Loop Antenna ◽  
Dual Band ◽  
Left Handed

A Metamaterial Inspired Compact Miniaturized Triple-band Near Field Resonant Parasitic Antenna for WLAN/WiMAX Applications

2021 ◽  
Vol 35 (12) ◽  
pp. 1539-1547
Author(s):  
Si Li ◽  
Atef Elsherbeni ◽  
Zhenfeng Ding ◽  
Yunlong Mao
Keyword(s):  
Near Field ◽  
Loop Antenna ◽  
Dual Band ◽  
Equivalent Circuits ◽  
Pass Band ◽  
Unit Structure ◽  
Left Handed ◽  
Radiation Properties ◽  
Compact Size ◽  
Triple Band

This paper presents a metamaterial-inspired triple-band antenna specified for WLAN and WiMAX applications with a compact size of 24mm × 18mm × 1mm (at 2.4 GHz). It consists of a dual-band left-handed metamaterial (LHM) unit surrounded by a G-style monopole antenna. The LHM is first designed and analyzed with equivalent circuits and simulations. A loop antenna based on the LHM unit is designed and simulated to investigate the radiating performance of the LHM unit structure. We also ran simulations for the G-style monopole. Later, the LHM unit is employed as a near-field resonant parasitic (NFRP) element that surrounded by the G-style monopole. A prototype of this antenna is fabricated. Simulations and measurements were carried out and the results match well, identifying good omni-directional radiating performance. Radiation comparisons with the loop antenna and the G-style monopole indicate that due to NFRP, the G-style monopole’s pass bands are shifted to lower frequencies to satisfy 2.45 GHz and 5.5 GHz bands requirements, meanwhile the LHM unit structure operates a third pass band of 3.5 GHz. The compact size and good radiation properties of the antenna render it suitable for WLAN/WiMAX applications.

scholarly journals Realizing UWB Antenna Array with Dual and Wide Rejection Bands Using Metamaterial and Electromagnetic Bandgaps Techniques

Micromachines ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 269
Author(s):  
Ayman A. Althuwayb ◽  
Mohammad Alibakhshikenari ◽  
Bal S. Virdee ◽  
Pancham Shukla ◽  
Ernesto Limiti
Keyword(s):  
Antenna Array ◽  
Ground Plane ◽  
Ultra Wideband ◽  
Dual Band ◽  
Area Network ◽  
Electromagnetic Bandgap ◽  
Uwb Antenna ◽  
Average Gain ◽  
Left Handed ◽  
Notched Band

This research article describes a technique for realizing wideband dual notched functionality in an ultra-wideband (UWB) antenna array based on metamaterial and electromagnetic bandgap (EBG) techniques. For comparison purposes, a reference antenna array was initially designed comprising hexagonal patches that are interconnected to each other. The array was fabricated on standard FR-4 substrate with thickness of 0.8 mm. The reference antenna exhibited an average gain of 1.5 dBi across 5.25–10.1 GHz. To improve the array’s impedance bandwidth for application in UWB systems metamaterial (MTM) characteristics were applied it. This involved embedding hexagonal slots in patch and shorting the patch to the ground-plane with metallic via. This essentially transformed the antenna to a composite right/left-handed structure that behaved like series left-handed capacitance and shunt left-handed inductance. The proposed MTM antenna array now operated over a much wider frequency range (2–12 GHz) with average gain of 5 dBi. Notched band functionality was incorporated in the proposed array to eliminate unwanted interference signals from other wireless communications systems that coexist inside the UWB spectrum. This was achieved by introducing electromagnetic bandgap in the array by etching circular slots on the ground-plane that are aligned underneath each patch and interconnecting microstrip-line in the array. The proposed techniques had no effect on the dimensions of the antenna array (20 mm × 20 mm × 0.87 mm). The results presented confirm dual-band rejection at the wireless local area network (WLAN) band (5.15–5.825 GHz) and X-band satellite downlink communication band (7.10–7.76 GHz). Compared to other dual notched band designs previously published the footprint of the proposed technique is smaller and its rejection notches completely cover the bandwidth of interfering signals.

A Dual Band Loop Antenna with Metal Frame for CubeSat Communication

2020 ◽  
Author(s):  
Sining Liu ◽  
Raad Raad ◽  
Panagiotis Ioannis Theoharis ◽  
Faisel Tubbal ◽  
Muhammad Usman Ali Khan ◽  
...  
Keyword(s):  
Loop Antenna ◽  
Dual Band ◽  
Metal Frame

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.

Implementation of a dual-band mixer using composite right/left-handed transmission lines

2007 ◽  
Author(s):  
P. de Paco ◽  
R. Villarino ◽  
G. Junkin ◽  
O. Menendez ◽  
J. Parron ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Dual Band ◽  
Left Handed

A compact dual-band D-CRLH-based antenna with self-isolation functionality

2021 ◽  
pp. 1-10
Author(s):  
Mahmoud A. Abdalla ◽  
Mohamed El Atrash ◽  
Ahmed A. Abdel Aziz ◽  
Mohamed I. Abdelnaser
Keyword(s):  
Patch Antenna ◽  
Planar Waveguide ◽  
Dual Band ◽  
Resonant Frequencies ◽  
Left Handed ◽  
Directional Radiation ◽  
Full Wave ◽  
Compact Size ◽  
Filtering Function ◽  
Filter Structures

Abstract This paper presents a compact dual-band filtering antenna without extra employing of filter structures. The antenna is designed using a planar dual-composite right/left-handed (D-CRLH) transmission line unit cell, where the filtering function is achieved through current cancellation between the D-CRLH resonators. The antenna is designed to function at 3.0 and 5.1 GHz, which can serve different WLAN applications. The antenna is a co-planar waveguide fed with a very compact size of only 30 × 16 mm2. Compared to the conventional patch antenna, the antenna size is only 17% at 3.0 GHz and 31% at 5.1 GHz. Despite the small size, the antenna preserves a good omni-directional radiation pattern at the two resonant frequencies with a measured realized gain of 2 and 2.7 dB, respectively. At the stopband in-between the two resonant bands, the reflection coefficient is almost 0 dB at 4.25 GHz and complete non-radiation is proved with a −11 dB measured realized gain. The different antenna filtering functions are verified by full-wave simulation and measurements.

SIMPLIFIED EXTENDED COMPOSITE RIGHT/LEFT-HANDED TRANSMISSION LINE STRUCTURE FOR DUAL-BAND APPLICATIONS

2010 ◽  
Vol 15 ◽  
pp. 137-144 ◽  
Author(s):  
Li Qiang ◽  
Hongmin Lu ◽  
Wei Zhao ◽  
Ji-Kang Wang ◽  
Bing Liu
Keyword(s):  
Transmission Line ◽  
Dual Band ◽  
Line Structure ◽  
Left Handed
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