Bandwidth-Compensation Method for Miniaturized Parallel Coupled-Line Filters

Myoung, Seong-Sik; Lee, Yong-Shik; Yook, Jong-Gwan

doi:10.1109/tmtt.2007.900310

Cited by 31 publications

(22 citation statements)

References 13 publications

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“…Thus to many extends it looks like a typical double resonator tunable bandpas filter tuned with two varactor diodes but our carefull design and realization provided one of the best device achieved till now. Except insertion loss all other parametrs are better than requirements and usually better than previous realizations described in the published papers [1][2][3][4]8,9]. Due to filter simplicity and its small size it can be stated that this is the best varactor tuned filter with constant absolute bandwidth.…”

Section: Introductionmentioning

confidence: 86%

“…Known tunable filter realizations [1][2][3][4][5][6][7][8][9] can be divided into several groups i.e. mechanically tuned [5], electricaly tuned (magnetically tuned [6], optically tuned, voltage tuned [1,3,4,7,9]), tuned in a narrow frequency range (usually related to high quality filters) [6], tuned in a wide frequency range (usually realted to LC or stripline realizations) [1,3,8,9] and many more.…”

Section: Introductionmentioning

confidence: 99%

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Design of varactor tuned bandpass filter

Gołaszewski

Zukocinski

Abramowicz

2015

2015 Conference on Microwave Techniques (COMITE)

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The tunable bandpass filter is presented. The filter is realized in microstrip technology employing two steppedimpedance resonators tuned with varactor diodes. The filter has constant absolute bandwidth of 30 MHz in the frequency range from 380 MHz to 920 MHz. The insertion loss is lower than 5 dB and return loss higher than 17 dB in the full tuning range. The out of band attenuation is higher than 40 dB at frequencies below the passband and is higher than 50 dB at frequencies above the passband. The first spurious modes are observed at 3 GHz. Absolute bandwidth and the time delay in the full tuning range change by 33% only while center frequency changes 242%.

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Section: Introductionmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Design of varactor tuned bandpass filter

Gołaszewski

Zukocinski

Abramowicz

2015

2015 Conference on Microwave Techniques (COMITE)

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“…There is a lot of known tunable filter realizations [1][2][3][4][5][6][7][8][9]. They can be divided into several groups i.e.…”

Section: Introductionmentioning

confidence: 99%

Voltage tunable bandpass filter

Gołaszewski

Abramowicz

2015

2015 Signal Processing Symposium (SPSympo)

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A voltage tunable bandpass filter is presented. The filter is realized in microstrip technology using two steppedimpedance resonators. The voltage tuning is provided by means of varactor diodes. The filter has fixed absolute bandwidth of 30 MHz in the frequency range from 375 MHz to 915 MHz. The insertion loss is lower than 5 dB and return loss better than 17 dB in the full tuning range. The out of band attenuation is better than 40 dB at frequencies below the passband and better than 50 dB at frequencies above the passband. The first spurious modes are observed at 6 GHz. Moreover the time delay in the full tuning range changes by 30% only. The filter is thermally stable. It has 1 dB compression point of 10 dBm and third-order intercept point of 21 dBm.

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“…1). This element, when simplified to a pair of coupled lines, can be found in [11][12][13], but focused on the magnitude of its frequency response. However, the approach here is different.…”

Section: Introductionmentioning

confidence: 99%

Analytical Study of Wide-Band Bandpass Filters Based on Wire-Bonded Multiconductor Transmission Lines With Lh Behaviour

SÃ¡nchez-MartÃnez

Márquez-Segura²

2012

PIER Letters

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Abstract-This paper presents a design methodology of wide-band bandpass filters based on short-circuited multi-conductor transmission lines with bonding wires between alternated strips. General design guidelines, based on analytical equations, are derived and a lefthanded behaviour of the multiconductor structure is inferred and studied. Analytical equations are assessed by means of full-wave electromagnetic simulations and experimental work. A very good agreement between theoretical results and measurements is achieved, that allows both the design and performance analysis of filters without the need for costly electromagnetic simulations. In addition, the equations presented yield a compact design of the filter with a lefthanded behavior.

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Bandwidth-Compensation Method for Miniaturized Parallel Coupled-Line Filters

Cited by 31 publications

References 13 publications

Design of varactor tuned bandpass filter

Design of varactor tuned bandpass filter

Voltage tunable bandpass filter

Analytical Study of Wide-Band Bandpass Filters Based on Wire-Bonded Multiconductor Transmission Lines With Lh Behaviour

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