Design of an Ultrawideband Directional Antenna Based on a Bidirectional Radiator and a Multilayer Pyramid Absorber

被引：0

作者：

Phakaew, Thipamas ^{[1
]}

Chalermwisutkul, Suramate ^{[1
]}

Kaemarungsi, Kamol ^{[2
]}

Thaiwirot, Wanwisa ^{[3
]}

机构：

[1] KMUTNB, Sirindhorn Int Thai German Grad Sch Engn TGGS, Bangkok, Thailand

[2] NSTDA, Natl Elect & Comp Technol Ctr NECTEC, Pathum Thani, Thailand

[3] KMUTNB, Fac Engn, Dept Elect & Comp Engn, Bangkok, Thailand

来源：

PROCEEDINGS OF 2019 2ND INTERNATIONAL CONFERENCE ON COMMUNICATION ENGINEERING AND TECHNOLOGY (ICCET 2019) | 2019年

关键词：

antennas; unidirectional; liquid level sensing;

D O I：

10.1109/iccet.2019.8726899

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

An antenna with a unidirectional radiation pattern for level sensing in a storage tank is presented. The proposed antenna configuration consists of a bidirectional radiator and a multilayer absorber. The frequency of operation ranges from 300 to over 1500 MHz with a reflection coefficient of less than -10 dB. By placing the multilayer absorber behind the bidirectional radiator, a stable unidirectional radiation pattern over the frequency range from 300 MHz to 900 MHz can be achieved. The absorber with 3 layers forms a pyramidal shape to absorb the signal at 3 difference frequency ranges namely around 300 MHz, 600 MHz and 900 MHz. This multilayer absorber is used to improve radiation pattern of the slot antenna by absorbing and reflecting the back lobe over the frequency of interest. The front to back ratio has a maximum value of 9.8 dB at 800 MHz.

引用

页码：129 / 133

页数：5

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