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[ author_sort:"dhwaj, kirti." ]
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Reconfigurable UWB Bandpass Filter w...
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Dhwaj, Kirti.
Reconfigurable UWB Bandpass Filter with Flexible Notch Characteristics.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Reconfigurable UWB Bandpass Filter with Flexible Notch Characteristics.
作者:
Dhwaj, Kirti.
面頁冊數:
42 p.
附註:
Source: Masters Abstracts International, Volume: 53-02.
附註:
Adviser: Tatsuo Itoh.
Contained By:
Masters Abstracts International53-02(E).
標題:
Electrical engineering.
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1557403
ISBN:
9781303947629
Reconfigurable UWB Bandpass Filter with Flexible Notch Characteristics.
Dhwaj, Kirti.
Reconfigurable UWB Bandpass Filter with Flexible Notch Characteristics.
- 42 p.
Source: Masters Abstracts International, Volume: 53-02.
Thesis (M.S.)--University of California, Los Angeles, 2014.
This item must not be sold to any third party vendors.
The thesis reports a compact tunable ultra-wideband (UWB) notch filter using hybrid microstrip and coplanar waveguide (CPW) structure. The tunable notch is implemented to filter out the wireless local area network (WLAN) channels from 5GHz to 6GHz. The proposed structure utilizes the resonance of open ended stubs to achieve transmission zeroes in the filter passband. Varactors and by-pass capacitors are then introduced for dynamic tunability of notch. Further, the electromagnetic decoupling of the two resonators leads to tunable bandwidth of notch. DC bias circuitry is implemented to control the varactor capacitances. Rejection levels up to 25 dB are attained using this technique while maintaining insertion loss levels below 2.5 dB in the passband. The reconfigurability of bandwidth is shown by maintaining a constant bandwidth of 150 MHz across the WLAN band for the notch. The filter achieves an excellent wide bandwidth (from 2.5 GHz to 8.5 GHz) using multimode-resonator (MMR) based topology which makes the filter one wavelength long at the central frequency.
ISBN: 9781303947629Subjects--Topical Terms:
454503
Electrical engineering.
Reconfigurable UWB Bandpass Filter with Flexible Notch Characteristics.
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The thesis reports a compact tunable ultra-wideband (UWB) notch filter using hybrid microstrip and coplanar waveguide (CPW) structure. The tunable notch is implemented to filter out the wireless local area network (WLAN) channels from 5GHz to 6GHz. The proposed structure utilizes the resonance of open ended stubs to achieve transmission zeroes in the filter passband. Varactors and by-pass capacitors are then introduced for dynamic tunability of notch. Further, the electromagnetic decoupling of the two resonators leads to tunable bandwidth of notch. DC bias circuitry is implemented to control the varactor capacitances. Rejection levels up to 25 dB are attained using this technique while maintaining insertion loss levels below 2.5 dB in the passband. The reconfigurability of bandwidth is shown by maintaining a constant bandwidth of 150 MHz across the WLAN band for the notch. The filter achieves an excellent wide bandwidth (from 2.5 GHz to 8.5 GHz) using multimode-resonator (MMR) based topology which makes the filter one wavelength long at the central frequency.
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