A Novel Class of Generalized Chebyshev Low-Pass Prototype for Suspended Substrate Stripline Filters

Alseyab, Saod A.

doi:10.1109/tmtt.1982.1131258

Cited by 49 publications

(28 citation statements)

References 3 publications

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“…제안된 방법을 이 용하면 그림 1과 같은 다중 대역 필터의 주파수 응 답으로부터 이러한 응답을 만족하는 최적화된 극점 과 영점의 위치를 찾을 수 있고, 최종적으로 그림 2 의 다중 대역 준 타원 LC 프로토 타입을 합성할 수 있다 [10], [11] . 설계 …”

Section: ⅰ 서 론unclassified

A Filter Synthesis Method for Multi-Band Filter Design

Lee¹,

Lee²,

Lim³

2010

The Journal of Korean Institute of Electromagnetic Engineering

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In this paper, we presented a new LC prototype synthesis method for the multi-band filter. For synthesis a multi-band filter with the required frequency response, we proposed the diagram of poles and zeros, also, we proposed the optimization process for finding the combination of optimized poles and zeros. From the transfer and reflection functions calculated from poles and zeros, we performed the quasi-elliptic LC prototype synthesis of multi-band filter. Using the proposed LC prototype synthesis method of multi-band filter, dual-band filter operating at GSM(880～960 MHz) and ISM(2,400～2,500 MHz) and triple-band filter operating at GSM(880～960 MHz) and ISM(2,400～2,500, 5,725～5,850 MHz) were designed and fabricated.

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Section: ⅰ 서 론unclassified

A Filter Synthesis Method for Multi-Band Filter Design

Lee¹,

Lee²,

Lim³

2010

The Journal of Korean Institute of Electromagnetic Engineering

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“…However, accuracy may be preserved by using the alternating pole technique [12,13] that derives the two admittances from the common denominator of either the re ection or transmission function, but the method does not apply to asymmetrical transfer functions. So once the two lossy admittances are obtained, either can be expressed as…”

Section: New Synthesis Techniquementioning

confidence: 99%

Synthesis of predistorted reflection‐mode hybrid prototype networks with symmetrical and asymmetrical characteristics

Fathelbab

Hunter

Rhodes

2001

Circuit Theory & Apps

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SUMMARYA new technique for predistorting ÿlter transfer functions to compensate for the dissipative losses present in the resonator elements is introduced. The method is based on the formation of two admittances from lossless transfer functions. Each admittance is then individually predistorted and connected to a 3-dB hybrid coupler. A simulated numerical example demonstrates that the method is capable of designing network prototypes with a combined predistorted re ection and transmission functions. Tables of prototype element values for elliptic lowpass=highpass functions are also provided.

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“…The problem is that there is no direct realisation of the series short circuited stubs associated with this low-pass prototype filter. In the existing physical realisation [5] the series short circuited stubs are approximated by short lengths of high impedance transmission line (forcing those transmission zeros at a quarter-wave frequency to move to infinity on the real axis), while the shunt series foster is realised exactly as an open circuited stub of double unit length. The approximation involved results in relatively poor stopband rejection.…”

Section: Introductionmentioning

confidence: 99%