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dc.contributor.author李宇峰en_US
dc.contributor.authorYu-Feng Leeen_US
dc.contributor.author郭仁財en_US
dc.contributor.authorJen-Tsai Kuoen_US
dc.date.accessioned2014-12-12T01:15:03Z-
dc.date.available2014-12-12T01:15:03Z-
dc.date.issued2007en_US
dc.identifier.urihttp://140.113.39.130/cdrfb3/record/nctu/#GT009513573en_US
dc.identifier.urihttp://hdl.handle.net/11536/38417-
dc.description.abstract本論文提出兩種方法壓抑平行耦合微帶線帶通濾波器之多重諧波。第一種是鋸齒耦合微帶線結構,藉由改變週期數目和調整幾何參數,分析此週期性結構所產生的截止帶之特性。利用不同週期數之耦合級所產生的不同截止帶,可串接成具有很寬的截止帶之帶通濾波器。本文並且實作一個三階電路,其量測結果顯示-30 dB之上截止帶可達中心頻率的十一點八倍。 第二種是將共振器施以加載開路殘段,先使每個共振器具有相同的通帶頻率,但具有不同的高階諧振頻率,藉多重高階諧波彼此抑制,以達到延伸上截止帶的效果。所製作的電路,量測數據與模擬結果相當一致。zh_TW
dc.description.abstractThis thesis presents two innovative parallel-coupled line filter structures for multi-spurious suppression. Parallel-coupled line filters with periodic corrugation are designed to realize a wide upper stopband with a satisfactory attenuation level. The stopband characteristics of the corrugated section are investigated by changing its geometric parameters and the number of periods. As a result, corrugated sections with various rejection bands are cascaded to construct a bandpass filter with a wide upper stopband. Measured responses of a tested third-order circuit show that the upper rejection band can be extended up to 11.8 times the passband frequency. In the second design, parallel-coupled line bandpass filters are synthesized based on stub-loaded resonators. The open stub behaves as a capacitor which can be trimmed to produce resonators with the same fundamental frequency, but different higher order resonant frequencies. The resonators with staggered higher order frequencies are designed to build a filter to achieve multi-spurious suppression in the upper stupband. Measured results show good agreement with simulated responses.en_US
dc.language.isozh_TWen_US
dc.subject濾波器zh_TW
dc.subject高階諧波zh_TW
dc.subject鋸齒結構zh_TW
dc.subject開路殘段zh_TW
dc.subjectfliteren_US
dc.subjectmultispurious suppressionen_US
dc.subjectcorrugation structureen_US
dc.subjectopen stuben_US
dc.title兩種具寬截止帶之微帶線帶通濾波器zh_TW
dc.titleTwo Microstrip Bandpass Filter Designs With an Extended Upper Stopbanden_US
dc.typeThesisen_US
dc.contributor.department電信工程研究所zh_TW
顯示於類別:畢業論文