Increasing radiation power in half width microstrip leaky wave antenna by using slots technique

<p class="Default">The radiation power in the endfire is decreased while the main beam of half substrate integrated waveguide scan from broadside to endfire in a forward. The design of half-width microstrip leaky-wave antenna (HW-MLWA) has been presented in this work to increase the power radiation near endfire by using the slots technique in the radiation element. This slot leads to a decrease the cross-polarization. The proposed design comprises one element of HW-MLWA with repeated meandered square slots in the radiation element. One aspect of this antenna is generated by using a half substrate integrated waveguide with a full tapered feed line. The proposed antenna was terminated by load of 50 Ω, and feed on the other end of the antenna. Finally, the suggested design is simulated and acceptable results were found. The released gain is increased from 10.6 dBi to 12 dBi at 4.3 GHz. This design is suitable for unmanned aerial vehicle UAVs at C band application.</p>

Download Full-text

Half mode substrate integrated waveguide based leaky wave antenna with low cross polarisation

Frequenz ◽

10.1515/freq-2019-0161 ◽

2020 ◽

Vol 74 (7-8) ◽

pp. 239-245

Author(s):

Pravesh Belwal ◽

Rahul Agrawal ◽

Suresh Chandra Gupta

Keyword(s):

Longitudinal Axis ◽

Forward Direction ◽

Main Beam ◽

Substrate Integrated Waveguide ◽

Cross Polarization ◽

Leaky Wave ◽

Leaky Wave Antenna ◽

Wave Antenna ◽

The Cross ◽

Polarization Level

AbstractA half mode substrate integrated waveguide (HMSIW) based leaky wave antenna (LWA) featuring low cross-polarization is proposed in this paper. The umbrella-shaped slot (the combination of longitudinal and transverse slots) is etched on the top layer of HMSIW LWA to get the efficient broadside radiation. The scanning range is obtained from −47° to +30° in a frequency range of 8.3 to 15.1 GHz. The cross-polarization level for the LWA is around −10 dB at broadside. In order to improve the cross-polarization levels in HMSIW LWA, two antennas are placed face to face obtaining the balanced symmetry across the longitudinal axis. Both the simulated and measured results show that the antenna is able to scan continuously from backward to forward direction with a very good low cross-polarization level. The developed prototype is capable of continuous beam scan from −29° to +32° in an operating frequency band of 9.2 to 15 GHz with a maximum gain of 13.5 dBi. The measured cross-polarization level is −30 dB which is quite low for the main beam at the broadside direction.

Download Full-text

A Leaky Wave Antenna Design Based on Half-mode Substrate Integrated Waveguide Technology for X Band Applications

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v7i6.pp3467-3474 ◽

2017 ◽

Vol 7 (6) ◽

pp. 3467

Author(s):

S. Doucha ◽

M. Abri ◽

H. Abri Badaoui ◽

B. Fellah

Keyword(s):

Forward Direction ◽

Slot Antenna ◽

Main Beam ◽

Substrate Integrated Waveguide ◽

Leaky Wave ◽

Leaky Wave Antenna ◽

Wave Antenna ◽

X Band ◽

New Type ◽

Base Structure

A new type of leaky-wave antenna (LWA) using half-mode substrate integrated waveguide (HMSIW) as the base structure is proposed in this paper. The structure consists of an array of slot, antenna designed to operate in X band applications from 8 to 12 GHz. HMSIW preserves nearly all the advantages of SIW whereas its size is nearly reduced by half. The antenna radiates one main beam that can be steered from the backward to the forward direction by changing frequency.

Download Full-text