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https://scholarbank.nus.edu.sg/handle/10635/25044
DC Field | Value | |
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dc.title | Design and analysis of ultra-wide band and millimeter-wave antennas | |
dc.contributor.author | ZHANG YAQIONG | |
dc.date.accessioned | 2011-07-31T18:00:19Z | |
dc.date.available | 2011-07-31T18:00:19Z | |
dc.date.issued | 2010-12-23 | |
dc.identifier.citation | ZHANG YAQIONG (2010-12-23). Design and analysis of ultra-wide band and millimeter-wave antennas. ScholarBank@NUS Repository. | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/25044 | |
dc.description.abstract | Ultra-wideband (UWB) antennas and 60-GHz millimeter-wave antennas and arrays are analyzed and designed in this thesis for developing high-speed short-range wireless communications. Firstly, a probe-fed crossed circle-disk monopole UWB antenna with stable omnidirectional radiation pattern was studied. The antenna was then cut by half to form a crossed semi-circle monopole antenna with a top-loaded patch to reduce its height. Moreover, a new crossed semi-ring band-notch UWB antenna with L shaped slots was developed. Secondly, an effective equivalent circuit for a UWB antenna was proposed for possible co-designing with analog/digital integrated circuits in the time domain by using a new automatic physical augmentation with tuning method. The proposed method has been validated for modeling a spiral inductor and an MIM capacitor in a wide bandwidth. Next, a new compact and multilayer UWB planar antenna was designed using the low temperature co-fired ceramics (LTCC) technology, which gives the possibility of integrating RF circuits and antennas in a single substrate. The configuration of the proposed multilayer UWB LTCC planar antenna fully exploits the three-dimensional (3-D) integration feature of the LTCC technology and explores a new way for antenna size reduction. Lastly, novel 60 GHz integrated antennas and arrays using the LTCC technology were developed. A new wideband planar circularly polarized helical antenna array was designed and realized in LTCC. Moreover, a wideband LTCC aperture-coupled truncated-corner circularly polarized patch antenna with a sequential rotation feeding scheme was proposed in the 60-GHz band. The wire-bonding packaging technology with a T-network compensation was also studied in the 60-GHz band. Development of an active circularly-polarized antenna by integrating the antenna array with a low noise amplifier in LTCC was demonstrated to enhance the receiving power. | |
dc.language.iso | en | |
dc.subject | ultra-wide band, millimeter-wave, antenna | |
dc.type | Thesis | |
dc.contributor.department | ELECTRICAL & COMPUTER ENGINEERING | |
dc.contributor.supervisor | GUO YONGXIN | |
dc.contributor.supervisor | LEONG MOOK SENG | |
dc.description.degree | Ph.D | |
dc.description.degreeconferred | DOCTOR OF PHILOSOPHY | |
dc.identifier.isiut | NOT_IN_WOS | |
Appears in Collections: | Ph.D Theses (Open) |
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File | Description | Size | Format | Access Settings | Version | |
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ZhangYQ.pdf | 5.84 MB | Adobe PDF | OPEN | None | View/Download |
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