Ultra-wideband microstrip-slotline bandpass filter with enhanced rejection skirts and widened upper stopband

Li, R.; Li, Zhu

doi:10.1049/el:20072421

Cited by 21 publications

(15 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, to further extend the bandwidth of the two balanced filters, patterned ground-plane technology [18] and interdigital coupled lines [27] can be introduced to the two balanced bandpass filters. Some lowpass networks can be also considered to improve the upper stopband performance of the two balanced filters [34].…”

Section: Measured Results and Discussionmentioning

confidence: 99%

Balanced filters with wideband common mode suppression using dual-mode ring resonators

Feng

Che

Xue

2015

IEEE Trans. Circuits Syst. I

View full text Add to dashboard Cite

Two novel balanced filters with wideband common mode suppression using dual-mode ring resonators are proposed in this paper. Two and four transmission zeros close to the passband are realized to improve the selectivity for the differential mode. In addition, over 20-dB common mode suppression can be realized from 0 GHz to ( is the center frequency of the passband), due to the all-stop transmission characteristic of the open/shorted coupled lines. To verify the presented concepts, two prototypes ( , ) with 3-dB fractional bandwidths of 22.9% and 21.9% for the differential mode are designed and fabricated. The theoretical and measured results agree well and show good in-band filtering performance and high selectivity.

show abstract

Section: Measured Results and Discussionmentioning

confidence: 99%

Balanced filters with wideband common mode suppression using dual-mode ring resonators

Feng

Che

Xue

2015

IEEE Trans. Circuits Syst. I

View full text Add to dashboard Cite

show abstract

“…In 2007, a compact filter with a faction bandwidth (FBW) of 60% was presented using a slotline resonator and two quarter‐wavelength microstrip resonator (QWRs). In the same year, two wideband filters using the triple‐mode slotline resonator and the microstrip‐slotline transition were designed with a FBW up to 120% . Further, the modified triple‐mode UWB slotline filters in were designed to obtain good differential‐mode (DM) response.…”

Section: Introductionmentioning

confidence: 99%

“…Further, the modified triple‐mode UWB slotline filters in were designed to obtain good differential‐mode (DM) response. Ultrawide passband in can be constructed with the lower/upper cut‐off edges dominated by the first/third resonant modes.…”

Section: Introductionmentioning

confidence: 99%

High selectivity and CM suppression wideband balanced BPF

Deng

Zhao

He³

et al. 2014

Micro & Optical Tech Letters

View full text Add to dashboard Cite

In this letter, a novel wideband balanced bandpass filter (BPF) with high selectivity and common‐mode (CM) suppression is constructed with slotline resonator. When the intersection points of the microstrip feedline and slotline resonator are close to the midpoint of the slotline resonator, the coupling between the second mode and microstrip feedline can be suppressed. Making use of this feature, the wideband single‐ended filter with wide upper‐stopband performance is designed using the slotline resonators and two quarter‐wavelength microstrip resonators paralleled to the slotline resonator with tapped‐line coupling at their short‐circuited ends. Further, high‐selectivity fifth‐order wideband single‐ended filter and corresponding balanced BPF are designed with parallel coupling structures between two slotline resonators. The fifth‐order wideband balanced filter is designed and fabricated, and good agreement between measurements and simulations is obtained. The measured CM suppressions are better than 54 dB within the whole differential‐mode passband. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2998–3003, 2014

show abstract

“…As an essential component in UWB RF front-end systems, UWB filter is required to be developed with compact size, low insertion loss, high out-ofband selectivity and flat group delay, etc. [1][2][3][4][5][6][7]. The parallelcoupled multi-mode stepped-impedance resonator [1] is usually used to realize broadband characteristics, and the number of poles in the passband is increased by making use of higher-order resonance modes of each resonator or adding the number of resonators of the filter.…”

Section: Introductionmentioning

confidence: 99%

“…In [6], a pair of embedded open stubs can be tuned to excite a band-reject response and avoid interference with the existing systems. Also, in [7], a Wshaped mircostrip slotline resonator with an additional crosscoupling path and two lowpass filters installed in the input/output ports improved greatly the out-of-band performance of the filter.…”

Section: Introductionmentioning

confidence: 99%

A novel miniature ultra-wideband microstrip filter using a short-ended interdigital coupled-line unit

Yang

Chen

et al. 2014

2014 IEEE International Symposium on Radio-Frequency Integration Technology

View full text Add to dashboard Cite

In this paper, a novel miniature ultra-wideband (UWB) microstrip bandpass filter is proposed. The filter consists of a short-ended interdigital coupled-line unit fed by steppedimpedance lines. Through adjusting the stepped-impedance feed lines, an ultra wide passband with equal-ripples can be obtained. The filter also has multiple transmission zeros on both sides of the passband, exhibiting favorable passband skirt property. The filter is fabricated, and its measured results show good agreement with the simulated responses.

show abstract

Ultra-wideband microstrip-slotline bandpass filter with enhanced rejection skirts and widened upper stopband

Cited by 21 publications

References 4 publications

Balanced filters with wideband common mode suppression using dual-mode ring resonators

Balanced filters with wideband common mode suppression using dual-mode ring resonators

High selectivity and CM suppression wideband balanced BPF

A novel miniature ultra-wideband microstrip filter using a short-ended interdigital coupled-line unit

Contact Info

Product

Resources

About