The Periodic Leaky-Wave Antenna With Different Unit Cells Based on Consistent Fundamental Mode

2020 ◽  
Vol 68 (12) ◽  
pp. 7794-7802
Author(s):  
Li Zuo ◽  
Kuang Wang ◽  
Yuanxin Li ◽  
Zhixi Liang ◽  
Shao Yong Zheng ◽  
...  
Keyword(s):  
Fundamental Mode ◽  
Leaky Wave ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Unit Cells

Fundamental-Mode Leaky-Wave Antenna (LWA) Using Slotline and Split-Ring-Resonator (SRR)-Based Metamaterials

2013 ◽  
Vol 12 ◽  
pp. 1424-1427 ◽  
Author(s):  
Gerard Zamora ◽  
Simone Zuffanelli ◽  
Ferran Paredes ◽  
Francisco Javier Herraiz-Martinez ◽  
Ferran Martin ◽  
...  
Keyword(s):  
Fundamental Mode ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Leaky Wave ◽  
Split Ring ◽  
Leaky Wave Antenna ◽  
Wave Antenna

scholarly journals A Miniaturized Reconfigurable CRLH Leaky-Wave Antenna Using Complementary Split-Ring Resonators

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Damiano Patron ◽  
Yuqiao Liu ◽  
Kapil R. Dandekar
Keyword(s):  
Split Ring Resonator ◽  
Ring Resonators ◽  
Leaky Wave ◽  
Split Ring ◽  
Complementary Split Ring Resonator ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Varactor Diodes ◽  
Unit Cells ◽  
Pcb Manufacturing

Composite Right-/Left-Handed (CRLH) Leaky-Wave Antennas (LWAs) are a class of radiating elements characterized by an electronically steerable radiation pattern. The design is comprised of a cascade of CRLH unit cells populated with varactor diodes. By varying the voltage across the varactor diodes, the antenna can steer its directional beam from broadside to backward and forward end-fire directions. In this paper, we discuss the design and experimental analysis of a miniaturized CRLH Leaky-Wave Antenna for the 2.4 GHz WiFi band. The miniaturization is achieved by etching Complementary Split-Ring Resonator (CSRR) underneath each CRLH unit cell. As opposed to the conventional LWA designs, we take advantage of a LWA layout that does not require thin interdigital capacitors; thus we significantly reduce the PCB manufacturing constraints required to achieve size reduction. The experimental results were compared with a nonminiaturized prototype in order to evaluate the differences in impedance and radiation characteristics. The proposed antenna is a significant achievement because it will enable CRLH LWAs to be a viable technology not only for wireless access points, but also potentially for mobile devices.

scholarly journals Leaky wave antenna with amplitude controlled beam steering based on composite right/left-handed transmission lines

2010 ◽  
Vol 8 ◽  
pp. 27-32 ◽  
Author(s):  
M. A. Eberspächer ◽  
T. F. Eibert
Keyword(s):  
Transmission Lines ◽  
Beam Steering ◽  
Main Beam ◽  
Beam Direction ◽  
Leaky Wave ◽  
Microstrip Technology ◽  
Left Handed ◽  
Leaky Wave Antenna ◽  
Wave Antenna ◽  
Unit Cells

Abstract. An antenna comprising two different composite right/left-handed transmission line structures is proposed which enables easy beam steering at an operation frequency of 10 GHz. The composite right/left-handed transmission lines are based on planar, periodically arranged via free unit cells, implemented in microstrip technology. Both transmission lines exhibit the infinite wavelength phenomenon which occurs at 9.72 GHz and 9.89 GHz, respectively. Thus, operating the different leaky wave structures at 10 GHz, radiation with azimuth angles of ±8° and ±17° can be achieved depending on the selected input port. In order to obtain a tunable main beam direction, the radiation patterns of both structures are superimposed by feeding them simultaneously. The influence of each guiding structure, and hence the direction of the main beam, can be controlled via the feeding amplitude. As a result of this, the beam can be steered between ±17° with a gain of up to 10 dBi. The guiding structures are arranged in parallel with a clearance of a=12.2 mm which is less than half of the wavelength in free space. This allows in a further step the attachment of additional guiding structures in order to increase the tunable angle range or creating an antenna array with a small beamwidth in the elevation plane without the occurrence of grating lobes. An antenna prototype was fabricated and validated by measurements.

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