Beam-Scanning Performance of Leaky-Wave Slot-Array Antenna on Variable Stub-Loaded Left-Handed Waveguide

2008 ◽  
Vol 56 (12) ◽  
pp. 3611-3618 ◽  
Author(s):  
Takaoki Ikeda ◽  
Kunio Sakakibara ◽  
Toru Matsui ◽  
Nobuyoshi Kikuma ◽  
Hiroshi Hirayama
Keyword(s):  
Array Antenna ◽  
Leaky Wave ◽  
Beam Scanning ◽  
Left Handed

scholarly journals High-Isolation Leaky-Wave Array Antenna Based on CRLH-Metamaterial Implemented on SIW with ±30o Frequency Beam-Scanning Capability at Millimetre-Waves

Electronics ◽  
2019 ◽  
Vol 8 (6) ◽  
pp. 642 ◽  
Author(s):  
Mohammad Alibakhshikenari ◽  
Bal Singh Virdee ◽  
Chan H. See ◽  
Raed A. Abd-Alhameed ◽  
Francisco Falcone ◽  
...  
Keyword(s):  
Mutual Coupling ◽  
Array Antenna ◽  
Impedance Bandwidth ◽  
Frequency Range ◽  
Leaky Wave ◽  
Beam Scanning ◽  
Millimetre Wave ◽  
Operating Frequency Range ◽  
Unit Cells ◽  
Transverse Slot

The paper presents a feasibility study on the design of a new metamaterial leaky-wave antenna (MTM-LWA) used in the construction of a 1 × 2 array which is implemented using substrate-integrated waveguide (SIW) technology for millimetre-wave beamforming applications. The proposed 1 × 2 array antenna consists of two LWAs with metamaterial unit-cells etched on the top surface of the SIW. The metamaterial unit-cell, which is an E-shaped transverse slot, causes leakage loss and interrupts current flow over SIW to enhance the array’s performance. The dimensions of the LWA are 40 × 10 × 0.75 mm3. Mutual-coupling between the array elements is suppressed by incorporating a metamaterial shield (MTM-shield) between the two antennas in the array. The LWA operates over a frequency range of 55–65 GHz, which is corresponding to 16.66% fractional bandwidth. The array is shown to exhibit beam-scanning of ±30° over its operating frequency range. Radiation gain in the backward (−30°), broadside (0°), and forward (+30°) directions are 8.5 dBi, 10.1 dBi, and 9.5 dBi, respectively. The decoupling slab is shown to have minimal effect on the array’s performance in terms of impedance bandwidth and radiation specifications. The MTM-shield is shown to suppress the mutual coupling by ~25 dB and to improve the radiation gain and efficiency by ~1 dBi and ~13% on average, respectively.

Composite Right/Left-Handed Leaky-Wave Antennas for Wide-Angle Beam Scanning With Flexibly Chosen Frequency Range

2020 ◽  
Vol 68 (1) ◽  
pp. 100-110 ◽  
Author(s):  
Debabrata K. Karmokar ◽  
Y. Jay Guo ◽  
Shu-Lin Chen ◽  
Trevor S. Bird
Keyword(s):  
Wide Angle ◽  
Frequency Range ◽  
Leaky Wave ◽  
Beam Scanning ◽  
Left Handed

Investigation and application of a liquid crystal loaded varactor in a voltage tunable CRLH leaky-wave antenna at Ka-band

2015 ◽  
Vol 7 (3-4) ◽  
pp. 361-367 ◽  
Author(s):  
María Roig ◽  
Matthias Maasch ◽  
Christian Damm ◽  
Rolf Jakoby
Keyword(s):  
Liquid Crystal ◽  
Leaky Wave ◽  
Beam Scanning ◽  
Ka Band ◽  
Interdigital Capacitor ◽  
Left Handed ◽  
Leaky Wave Antenna ◽  
Wave Antenna

In this work, a voltage tunable interdigital capacitor loaded with liquid crystal (LC) is investigated and its application for a composite right/left-handed leaky-wave antenna (LWA) is demonstrated. The tuning capability of the varactor is confirmed by simulation and measurement. A material tunability of 25% of the used LC yields a measured varactor tunability of 9%. Based on this, a tunable LWA with a beam scanning of 14 degrees at 26.7 GHz is implemented and measured.

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