| Project/Area Number |
06650383
|
|---|
| Research Category |
Grant-in-Aid for General Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
電子デバイス・機器工学
|
|---|
| Research Institution | Saitama University |
|---|
Principal Investigator |
HANEISHI Misao Faculty of Engineering, Saitama University, Professor, 工学部, 教授 (80008862)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MATSUI Akinori Saitama Institute of Technology, Faculty of Engineering, Lecturer, 工学部, 講師 (20255144)
|
|---|
| Project Period (FY) |
1994 – 1995
|
| Project Status |
Completed (Fiscal Year 1995)
|
| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1994: ¥1,700,000 (Direct Cost: ¥1,700,000)
|
|---|
| Keywords | Planar antenna / CP-wave antenna / Microstrip antenna / Printed antenna / Beam-tilt / Radial-line / High-gain / High-efficiency |
|---|
| Research Abstract |
In construction of a large-scale multi-element planar array, reduction of the feeding loss is important for realization of high-efficiency performance. In reflection of this requirement, much attention is paid to a planar antenna having a loss-suppressed feeding system.
This work presents a beam-tilt type planar antenna which excites singly-fed circularly polarized microstrip antenna (CP-MSA) via a low-loss radial waveguide. In order to check the performance of this antenna, some beam-tilt type planar arrays were fabricated and tested at the SHF-band.
As a result of experiment, the following results were obtained. The axial ratio of the array was suppressed to below 1.0 dB over a wide range of frequency band. The aperture efficiency eta as determined from the inner diameter of the radial line reached approximately 90% at the SHF-band.
On examining the input impedance characteristics, VSWR of a test array was below 1.5 over a broadband region.
As mentioned previously, this planar array fed by a radial line demonstrated high-efficiency performance (approximately 90% aperture efficiency). It was conformed that this type of antenna can be useful model of a circularly polarized planar antenna.
|
