![]() įringing Effect: The amount of fringing is a function of the dimension of patch and the height of the substrate. Basically the transmission line model represents the micristrip antenna by two slots, separated by a low-impedance Zc transmission line of length L. Ī rectangular microstrip antenna can be represented as an array of two radiating narrow slots each of width W and height H, separated by a distance L. ![]() It is very easy to analyze using both the transmission line and cavity models, which are most accurate for thin substrates. The rectangular patch is by far the widely used configuration. Microstrip antennas received considerable attention starting in the 1970. The solution of the resulting matrix equation give the surface distributions over the conducting and dielectric surfaces. The current and surface distributions can then be represented by appropriate basis functions over these patches to convert the integral equations to a matrix equation using a moment method. When the microstrip geometry is non-circular, or even arbitrary in shape, one can use a surface-patch segmentation over the conducting and dielectric surfaces. The assumption does not introduce a severe difficulty in impendence calculations since microstrip geometries are inherently resonant structures and their impendence characteristic is primarily controlled by the printed elements. So the solution is valid for infinite geometries, or when the substrate and ground-plane dimensions are relatively large. All these methods assume that the dielectric substrate & the supporting ground plane are infinite in extent. ![]() Numerical methods are also developed & have received increasing attention in the recent years, these being primarily based on Sommerfeld-type integral equations. To analyze its impendence and radiation properties many elaborate analytical techniques are proposed & used. MPA is finding increasing popularity owing to its advantages like less size, Less costly, Conformity to the supporting structure and ease of fabrication. ![]() The advantages of MPA at microwave frequencies is its compatibility with large scale printed circuit fabrication. MPA has found increasing use as it can be fabricated by lithographic circuits. Microstrip Patch antenna (MPA) is a new & exciting technology efficiently for application as conformal antennas on missiles & aircraft. ![]()
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