scholarly journals SCATTERING AND RADIATION CHARACTERISTICS OF ANTENNA SYSTEMS UNDER NOSE DIELECTRIC RADOMES

2017 ◽  
Vol 76 ◽  
pp. 141-157 ◽  
Author(s):  
Oleg I. Sukharevsky ◽  
Vitaly Vasylets ◽  
Sergey V. Nechitaylo
Keyword(s):  
Radiation Characteristics ◽  
Antenna Systems ◽  
Scattering And Radiation

scholarly journals Reduction of the In-Band RCS of Microstrip Patch Antenna by Using Offset Feeding Technique

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Weiwei Xu ◽  
Junhong Wang ◽  
Meie Chen ◽  
Zhan Zhang ◽  
Zheng Li
Keyword(s):  
Frequency Band ◽  
Plane Waves ◽  
Patch Antennas ◽  
Radiation Characteristics ◽  
Antenna Structure ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Feeding Technique ◽  
Structural Mode ◽  
Scattering And Radiation

This paper presents a method for implementing a low in-band scattering design for microstrip patch antennas based on the analysis of structural mode scattering and radiation characteristics. The antenna structure is first designed to have the lowest structural mode scattering in a desired frequency band. The operating frequency band of the antenna is then changed to coincide with that of the lowest structural mode scattering by adjusting the feed position on the antenna (offset feeding) to achieve an antenna with low in-band radar cross section (RCS). In order to reduce the level of cross polarization of the antenna caused by offset feeding, symmetry feeding structures for both single patch antennas and two-patch arrays are proposed. Examples that show the efficiency of the method are given, and the results illustrate that the in-band RCS of the proposed antennas can be reduced by as much as 17 dBsm for plane waves impinging from the normal direction compared to patch antennas fed by conventional methods.

scholarly journals Radiation Pattern Analysis of Antenna Systems for MIMO and Diversity Configurations

2005 ◽  
Vol 3 ◽  
pp. 157-165 ◽  
Author(s):  
O. Klemp ◽  
H. Eul
Keyword(s):  
Radiation Pattern ◽  
Channel Capacity ◽  
Communication Systems ◽  
Pattern Analysis ◽  
Multiple Input Multiple Output ◽  
Analytical Description ◽  
Radiation Characteristics ◽  
Antenna Radiation ◽  
Mimo Antenna ◽  
Antenna Systems

Abstract. Multiple-input multiple-output (MIMO) antenna systems and antenna configurations for wideband multimode diversity rank among the emerging key technologies in next generation wireless communication systems. The analysis of such transmission systems usually neglects the influences of real antenna radiation characteristics as well as the influences of mutual coupling in a multielement antenna arrangement. Nevertheless, to achieve a detailed description of diversity gain and channel capacity by using several transmit- and receive antennas in a wireless link, it is essential to take all those effects into account. The expansion of the radiation fields in terms of spherical eigenmodes allows an analytical description of the antenna radiation characteristics and accounts for all the coupling effects in multielement antenna configurations. Therefore the radiation pattern analysis by spherical eigenmode expansion provides an efficient alternative to establish an analytical approach in the calculation of envelope correlation or channel capacity.

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