scholarly journals Tilted- and axial-beam formation by a single-arm rectangular spiral antenna with compact dielectric substrate and conducting plane

2002 ◽  
Vol 50 (1) ◽  
pp. 17-24 ◽  
Author(s):  
H. Nakano ◽  
J. Eto ◽  
Y. Okabe ◽  
J. Yamauchi
Keyword(s):  
Dielectric Substrate ◽  
Spiral Antenna ◽  
Conducting Plane ◽  
Beam Formation

Design of the Micro-Strip Antenna for Wireless Capsule Endoscope

2015 ◽  
Vol 8 (3) ◽  
pp. 43-58
Author(s):  
Dechun Zhao ◽  
Xiaoyu Chen ◽  
Longsheng Zhang ◽  
Huiquan Zhang
Keyword(s):  
High Performance ◽  
Ground Plane ◽  
Image Data ◽  
Dielectric Substrate ◽  
Surrounding Tissue ◽  
Capsule Endoscope ◽  
Spiral Antenna ◽  
Shorting Pin ◽  
Compact Size ◽  
Wireless Capsule

This paper analyzed the type of mini-type antenna, studied the miniaturization technique based on simulation in depth, and finally designed the high-performance micro-strip antenna. The advantages of micro-strip antenna are light-weight, compact size, relatively thin thickness, and so on. However, it still needs aggressive miniaturization to satisfy the requirements of encapsulation. Techniques for miniaturization of antenna mainly include a ground plane, double-layer patch, shorting pin or wall, lossless dielectric substrate and the spiral structure. The techniques of multi-layer and shorting wall can narrow down the resonant frequency and attain bandwidth enhancement. Nonetheless, they have a complicated structure. Thus, simulation researched the influence of the surrounding tissue in detail, the position relation of shorting pin and the feed point, the substrate parameters and the structure parameters of the spiral antenna on performance. At last, through the techniques of the shorting pin, high permittivity substrate and the spiral shape, two Archimedean micro-strip patch antennas were developed for wireless capsule endoscope. The antenna has the bandwidth of about 300 MHz, the minimum voltage standing-wave ratio of 1.14:1, and the diameter of 8.3 mm. Therefore, the antenna can offer excellent performance for transmitting image data.

scholarly journals A spiral antenna backed by a conducting plane reflector

1986 ◽  
Vol 34 (6) ◽  
pp. 791-796 ◽  
Author(s):  
H. Nakano ◽  
K. Nogami ◽  
S. Arai ◽  
H. Mimaki ◽  
J. Yamauchi
Keyword(s):  
Spiral Antenna ◽  
Conducting Plane

Second-Mode Operation of an Archimedean Spiral Antenna Backed by a Conducting Plane Reflector

1994 ◽  
Vol 14 (3-4) ◽  
pp. 319-327 ◽  
Author(s):  
Junji Yamauchi ◽  
Kazuhiro Hayakawa ◽  
Hisamatsu Nakano
Keyword(s):  
Spiral Antenna ◽  
Archimedean Spiral ◽  
Conducting Plane ◽  
Mode Operation ◽  
Second Mode
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