Radiation Through a Stratified Plasma with a Dielectric Window

1971 ◽  
Vol 49 (23) ◽  
pp. 2938-2946
Author(s):  
K. Sivaprasad ◽  
B. Celikkol
Keyword(s):  
Plasma Layer ◽  
Inhomogeneous Plasma ◽  
Slot Antennas ◽  
Input Admittance ◽  
Modal Expansion ◽  
Rectangular Slot ◽  
Single Aperture ◽  
Dielectric Window

The input admittances of a pair of identical rectangular slot antennas radiating through a square dielectric window which is covered with an inhomogeneous plasma layer has been studied using a modal expansion of the fields. General expressions for the input admittance of a single aperture and mutual admittance between slots arbitrarily located under the window are given. Proper approximations used to simplify the field calculations within the window are discussed.

Spurious radiation suppression in microstrip monopulse antenna

2020 ◽  
Vol 39 (4) ◽  
pp. 791-799
Author(s):  
Rasime Uyguroğlu ◽  
Allaeldien Mohamed Hnesh ◽  
Muhammad Sohail ◽  
Abdullah Y. Oztoprak
Keyword(s):  
Array Antenna ◽  
Slot Antennas ◽  
Conducting Plane ◽  
Content Type ◽  
Rectangular Slot ◽  
Substrate Layer ◽  
Feed Network ◽  
Microstrip Array ◽  
Spurious Radiation ◽  
Microstrip Array Antenna

Purpose This paper aims to introduce a new novel microstrip monopulse comparator system to reduce the spurious radiation from the comparator and the feed network for achieving better radiation performance. Design/methodology/approach Two substrate layers have been used for the microstrip monopulse comparator system. The feed network and the comparator circuits are on the first substrate layer and the microstrip array antenna is on the second layer. The elements of the array antenna are novel square four-sided narrow rectangular slot antennas built on a conducting plane. A commercially available computational software, CST microwave studio, has been used for the analysis of the system. Findings Two substrate layers have been used for the microstrip monopulse comparator system. The feed network and the comparator circuits are on the first substrate layer and the microstrip array antenna is on the second layer. The elements of the array antenna are novel square four-sided narrow rectangular slot antennas built on a conducting plane. A commercially available computational software, CST microwave studio, has been used for the analysis of the system. Practical implications The system is proposed for tracking moving targets. Originality/value Novel slot radiators are introduced as radiating elements in this paper. The antenna arrangement shields the comparator and the feed network circuits, reducing the spurious radiation significantly.

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