Design of miniaturized log-periodic dipole antennas
With the rapid development of wire less communication, antenna miniaturization has been a hot topic m the past ten or twenty years so that increasing requirement has been proposed for miniaturized antennas. Miniaturization of log-periodic dipole antennas (LPDA) is studied at very high fr...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
2015
|
| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/64774 |
| _version_ | 1811686763756781568 |
|---|---|
| author | Ning, Linglin |
| author2 | Shen Zhongxiang |
| author_facet | Shen Zhongxiang Ning, Linglin |
| author_sort | Ning, Linglin |
| collection | NTU |
| description | With the rapid development of wire less communication, antenna
miniaturization has been a hot topic m the past ten or twenty years so that
increasing requirement has been proposed for miniaturized antennas.
Miniaturization of log-periodic dipole antennas (LPDA) is studied at very high
frequency (VHF) band in the dissertation, based on antenna and microwave circuit
theories.
A printed LPDA in a traditional design proposed by R. Carrel is firstly
discussed for the specified electrical and mechanical specifications. Then two
types of antenna miniaturization methods are employed according to the
traditional design of LPDA. One is to use meander structure by folding the longer
dipoles to directly decrease the length of dipoles; the other is to load the antenna
with dielectric materials. Compared to the traditional LPDA, the corresponding
dimensions of folded LPDA are optimized by HFSS simulation. Then the antenna
is redesigned using the software by loading with different dielectric material.
Their radiation characteristics are discussed and compared through HFSS
simulating. The results have indicated that all of the three designs meet the
requirements while the folded LPDA achieves a 40% size reduction, compared to
the traditional one and the dielectric loaded LPDA reduces its size by 70%. |
| first_indexed | 2024-10-01T05:05:35Z |
| format | Thesis |
| id | ntu-10356/64774 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:05:35Z |
| publishDate | 2015 |
| record_format | dspace |
| spelling | ntu-10356/647742023-07-04T16:05:14Z Design of miniaturized log-periodic dipole antennas Ning, Linglin Shen Zhongxiang School of Electrical and Electronic Engineering DRNTU::Engineering With the rapid development of wire less communication, antenna miniaturization has been a hot topic m the past ten or twenty years so that increasing requirement has been proposed for miniaturized antennas. Miniaturization of log-periodic dipole antennas (LPDA) is studied at very high frequency (VHF) band in the dissertation, based on antenna and microwave circuit theories. A printed LPDA in a traditional design proposed by R. Carrel is firstly discussed for the specified electrical and mechanical specifications. Then two types of antenna miniaturization methods are employed according to the traditional design of LPDA. One is to use meander structure by folding the longer dipoles to directly decrease the length of dipoles; the other is to load the antenna with dielectric materials. Compared to the traditional LPDA, the corresponding dimensions of folded LPDA are optimized by HFSS simulation. Then the antenna is redesigned using the software by loading with different dielectric material. Their radiation characteristics are discussed and compared through HFSS simulating. The results have indicated that all of the three designs meet the requirements while the folded LPDA achieves a 40% size reduction, compared to the traditional one and the dielectric loaded LPDA reduces its size by 70%. Master of Science (Communications Engineering) 2015-06-04T02:11:35Z 2015-06-04T02:11:35Z 2014 2014 Thesis http://hdl.handle.net/10356/64774 en 62 p. application/pdf |
| spellingShingle | DRNTU::Engineering Ning, Linglin Design of miniaturized log-periodic dipole antennas |
| title | Design of miniaturized log-periodic dipole antennas |
| title_full | Design of miniaturized log-periodic dipole antennas |
| title_fullStr | Design of miniaturized log-periodic dipole antennas |
| title_full_unstemmed | Design of miniaturized log-periodic dipole antennas |
| title_short | Design of miniaturized log-periodic dipole antennas |
| title_sort | design of miniaturized log periodic dipole antennas |
| topic | DRNTU::Engineering |
| url | http://hdl.handle.net/10356/64774 |
| work_keys_str_mv | AT ninglinglin designofminiaturizedlogperiodicdipoleantennas |