By Kin-Lu Wong
A one-stop connection with the layout and research of nonplanar microstrip structures.Owing to their conformal strength, nonplanar microstrip antennas and transmission traces were intensely investigated during the last decade. but many of the collected examine has been too scattered around the literature to be precious to scientists and engineers engaged on those curved structures.Now, antenna specialist Kin-Lu Wong compiles and organizes the most recent study effects and different state of the art advancements into an in depth survey of the features of microstrip antennas fastened on canonical nonplanar surfaces. Demonstrating a number of theoretical thoughts and deducing the final features of nonplanar microstrip antennas from calculated effects, Wong completely addresses the issues of cylindrical, round, and conical buildings and offers readers strong layout and optimization tools.Up-to-date issues variety from particular functions of round and conical microstrip arrays to the curvature results at the research of cylindrical microstrip strains and coplanar waveguides. With 256 illustrations and an exhaustive record of references, layout of Nonplanar Microstrip Antennas and Transmission traces is an fundamental advisor for antenna designers in instant and private communications and in radar platforms, and a useful reference for researchers and scholars attracted to this significant know-how.
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Extra info for Design of Nonplanar Microstrip Antennas and Transmission Lines
From Ref. 19 Quality factor versus normalized substrate thickness for the case shown in Figure. 18. (From Ref. 027 ; 8159. 18 cm. (From Ref. 21 Quality factor versus normalized substrate thickness for the case shown in Figure. 20. (From Ref. ) microstrip structures. 19. It is seen that the quality factor decreases with decreasing cylinder radius. This suggests that a cylindrical triangular microstrip structure is more suitable than a planar triangular microstrip structure for use as a radiator.
The electromagnetic energy is then coupled from the feed line to the microstrip patch through the coupling slot. 8 cm. (From Ref. 11. (From Ref. ) coupling slot, the resonant frequency of the microstrip structure is strongly affected. Accurate determination of the resonant frequency of the microstrip structure with a coupling slot is thus important. This problem can be solved using a full-wave approach. The theoretical formulation and results are given below. 13. The coupling slot of length L, and width W, is assumed to be narrow (L, >> W,) and centered below the patch.
82), is analyzed and Characteristics Typical numerical results of the resonant frequency, half-power bandwidth, radiation pattern, and directivity for the TM,, mode are presented. 6 shows the dependence of the normalized resonant frequency (the resonant frequency is set to be unity when the substrate thickness approaches zero and the superstrate layer is absent) and the half-power bandwidth on the spacing S. The case of a superstrate layer directly loaded on the patch (S = 0) is also shown. It is seen that superstrate loading strongly reduces the resonant frequency of the microstrip patch for the case of S = 0.