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Thipamas Phakaew. Development of wideband antennas for level sensor using guided wave radar technique in storage tanks. Master's Degree(Communication Engineering (International Program)). King Mongkut's University of Technology North Bangkok. Central Library. : King Mongkut's University of Technology North Bangkok, 2018.
Development of wideband antennas for level sensor using guided wave radar technique in storage tanks
Name: Thipamas Phakaew
LCSH:
ULTRA-WIDEBAND ANTENNAS
LCSH:
MONOPULSE RADAR
LCSH:
STORAGE TANKS
Abstract:
This thesis focuses on antenna design for storage tanks level measurement by the radar technique. The antenna was designed to cover the frequency range from 300 MHz to
900 MHz and to have a uni-directional radiation pattern. A wideband circular disc monopole antenna is used as the basic for the antenna design. In this work radiator of the circular disc monopole is modified to a monkey face shape to increase the electrical length and reduce the antenna size (miniaturization). The antenna radiator is framed by a ground plane with two curved loading strips and straight strips to form the bi-directional pattern over the bandwidth of interest by controlling the behavior of the electric fields within the ground area. Multilayer absorber behind the antenna was used to form a uni-directional radiation pattern by absorbing the back lobe over the bandwidth of interest. The absorber has 3 layers forming a pyramid to absorb the signal at 3 difference frequencies namely 300 MHz, 600 MHz and 900 MHz. The propose antenna covers a frequency range from 300 to 1500 MHz and beyond as
confirmed by simulation and measurement where the input return loss is smaller than -10 dB and a stable uni-directional radiation pattern is observed over the frequency range from 300
MHz to 900 MHz. Bi-static radar level measurement experiment in the laboratory by using a metal sheet, water, and oil as reflector to find out the best position and direction of antennas and the target distance is also presented in this thesis. The PNA-X Network Analyzer (N5242A) from Agilent Technologies was used to measure the power transfer of the signal (S21). Backscattered signal was measured as S21 between Tx and Rx antennas. Inverse fast Fourier transform in MATLAB of the was applied to obtain the time domain data which can be interpreted as the distance between the sensor and the liquid surface.
King Mongkut's University of Technology North Bangkok. Central Library
Address:
BANGKOK
Email:
library@kmutnb.ac.th
Name: Suramate Chalermwisutkul
Role:
thesis advisors
Email :
suramate.c@tggs.kmutnb.ac.th
Name: Wanwisa Thaiwirot
Role:
thesis advisors
Email :
mod_telecom@hotmail.com, wanwisat@kmutnb.ac.th
Created:
2018
Modified:
2020-09-22
Issued:
2020-09-22
วิทยานิพนธ์/Thesis
application/pdf
eng
DegreeName: Master of Engineering
Level: Master's Degree
©copyrights King Mongkut's University of Technology North Bangkok
RightsAccess:
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0.033139 วินาที
Thipamas Phakaew
| Title | Contributor | Type |
|---|---|---|
| Development of wideband antennas for level sensor using guided wave radar technique in storage tanks
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Thipamas Phakaew | Suramate Chalermwisutkul Wanwisa Thaiwirot | วิทยานิพนธ์/Thesis |
| An X-band array antenna for forward looking radar in collision avoidance systems of locomotives
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Thipamas Phakaew;Tiwat Pongthavornkamol;Prayoot Akkaraekthalin;Suramate Chalermwisutkul | บทความ/Article |
Suramate Chalermwisutkul
Wanwisa Thaiwirot
| Title | Creator | Type and Date Create |
|---|---|---|
| Development of wideband antennas for level sensor using guided wave radar technique in storage tanks
มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าพระนครเหนือ Suramate Chalermwisutkul;Wanwisa Thaiwirot | Thipamas Phakaew | วิทยานิพนธ์/Thesis |