Slot arrays in special waveguide technologies

2018 ◽  
pp. 291-315
Keyword(s):  
Slot Arrays

scholarly journals A Review on Improved Design Techniques for High Performance Planar Waveguide Slot Arrays

Electronics ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1311
Author(s):  
Giovanni Andrea Casula ◽  
Giuseppe Mazzarella ◽  
Giorgio Montisci ◽  
Giacomo Muntoni
Keyword(s):  
Planar Waveguide ◽  
High Performance ◽  
Order Effects ◽  
Waveguide Slot ◽  
Waveguide Bends ◽  
Radar Systems ◽  
Slot Arrays ◽  
Planar Array ◽  
Improved Design ◽  
Design Techniques

Planar waveguide slot arrays (WSAs) have been used since 1940 and are currently used as performing antennas for high frequencies, especially in applications such as communication and RADAR systems. We present in this work a review of the most typical waveguide slot array configurations proposed in the literature, describing their main limitations and drawbacks along with possible effective countermeasures. Our attention has been focused mainly on the improved available design techniques to obtain high performance WSAs. In particular, the addressed topics have been reported in the following. Partially filled WSAs, or WSAs covered with single or multilayer dielectric slabs, are discussed. The most prominent second-order effects in the planar array feeding network are introduced and accurately modeled. The attention is focused on the T-junction feeding the array, on the effect of interaction between each slot coupler of the feeding network and the radiating slots nearest to this coupler, and on the waveguide bends. All these effects can critically increase the first sidelobes if compared to the ideal case, causing a sensible worsening in the performance of the array.

scholarly journals Switchable Frequency Selective Slot Arrays

2011 ◽  
Vol 59 (7) ◽  
pp. 2728-2731 ◽  
Author(s):  
B. Sanz-Izquierdo ◽  
E. A. Parker ◽  
J. C. Batchelor
Keyword(s):  
Slot Arrays ◽  
Frequency Selective
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