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Author

G. L. Matthaei

Bio: G. L. Matthaei is an academic researcher. The author has contributed to research in topics: Waveguide filter & Prototype filter. The author has an hindex of 3, co-authored 4 publications receiving 4675 citations.

Papers
More filters
ReportDOI
01 Jan 1963
TL;DR: In this paper, a wide variety of lowpass, band-pass, high-pass and band-stop microwave filters are presented for multiplexers; for certain kinds of directional couplers; and data relevant to the use of prototype filters as a basis for the design of impedance-matching networks and time-delay net works.
Abstract: : Design techniques are presented for a wide variety of low-pass, band-pass, high-pass, and band-stop microwave filters; for multiplexers; and for certain kinds of directional couplers. Most of the design procedures described make use of either a lumped-element low-pass p-otype filter or a step- transformer prototype as a basis for design. Prototype filter designs are tabulated, and data is given relevant to the use of prototype filters as a basis for the design of impedance-matching networks and time-delay net works. Design formulas and tables for step transformer prototypes are also given. The design of microwave filter structures to serve as impedance-matching networks is discussed. The design of microwave filters to achieve various time-delay (or slow-wave) properties is also discussed. Various equations, graphs, and tables are collected relevant to the design of coaxial lines, strip-lines, waveguides, parallel-coupled lines between common ground planes, arrays of lines between ground planes, coupling and junction discontinuities, and resonators. Techniques for measuring the Q's of resonators and the coupling coefficients between resonators are also discussed, along with procedures for tuning filters.

395 citations

ReportDOI
01 Jan 1963
TL;DR: In this paper, a wide variety of lowpass, band-pass, high-pass and band stop microwave filters are presented for multiplexers; for certain kinds of directional couplers; and data relevant to the use of prototype filters as a basis for the design of impedance-matching networks and time-delay net works.
Abstract: : Design techniques are presented for a wide variety of low-pass, band- pass, high-pass and band stop microwave filters; for multiplexers; and for certain kinds of directional couplers. Most of the design procedures described make use of either a lumped-element low-pass prototype filter or a step- transformer prototype as a basis for design. Prototype filter designs are tabulated, and data is given relevant to the use of prototype filters as a basis for the design of impedance-matching networks and time-delay net works. Design formulas and tables for step transformer prototypes are also given. The design of microwave filter structures to serve as impedance-matching networks is discussed. The design of microwave filters to achieve various time-delay (or slow-wave) properties is also discussed. Various equations, graphs, and tables are collected together relevant design of coaxial lines, strip-lines, waveguides, parallel coupled lines between common ground planes, arrays of lines between ground planes, coupling and junction discontinuities, and resonators. Techniques for measuring the Q's of resonators and the coupling coefficients between resonators are also discussed, along with procedures for tuning filters.

370 citations

Patent
11 Jan 1968

2 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this article, a new defected ground unit structure (DGS) for the microstrip line is proposed, which can provide the bandgap characteristic in some frequency bands with only one or more unit lattices.
Abstract: A new defected ground structure (DGS) for the microstrip line is proposed in this paper. The proposed DGS unit structure can provide the bandgap characteristic in some frequency bands with only one or more unit lattices. The equivalent circuit for the proposed defected ground unit structure is derived by means of three-dimensional field analysis methods. The equivalent-circuit parameters are extracted by using a simple circuit analysis method. By employing the extracted parameters and circuit analysis theory, the bandgap effect for the provided defected ground unit structure can be explained. By using the derived and extracted equivalent circuit and parameters, the low-pass filters are designed and implemented. The experimental results show excellent agreement with theoretical results and the validity of the modeling method for the proposed defected ground unit structure.

1,269 citations

Journal ArticleDOI
01 Feb 1986
TL;DR: Wave digital filters (WDFs) as discussed by the authors are modeled after classical filters, preferably in lattice or ladder configurations or generalizations thereof, and have very good properties concerning coefficient accuracy requirements, dynamic range, and especially all aspects of stability under finite-arithmetic conditions.
Abstract: Wave digital filters (WDFs) are modeled after classical filters, preferably in lattice or ladder configurations or generalizations thereof. They have very good properties concerning coefficient accuracy requirements, dynamic range, and especially all aspects of stability under finite-arithmetic conditions. A detailed review of WDF theory is given. For this several goals are set: to offer an introduction for those not familiar with the subject, to stress practical aspects in order to serve as a guide for those wanting to design or apply WDFs, and to give insight into the broad range of aspects of WDF theory and its many relationships with other areas, especially in the signal-processing field. Correspondingly, mathematical analyses are included only if necessary for gaining essential insight, while for all details of more special nature reference is made to existing literature.

937 citations

Journal ArticleDOI
TL;DR: In this article, the authors present new concepts that allow for the complete integration of planar circuits and waveguide filters synthesized on a single substrate by means of metallized post (or via-hole) arrays.
Abstract: The integrated planar technique has been considered as a reliable candidate for low-cost mass production of millimeter-wave circuits and systems. This paper presents new concepts that allow for a complete integration of planar circuits and waveguide filters synthesized on a single substrate by means of metallized post (or via-hole) arrays. Analysis of the synthesized integrated waveguide and design criteria are presented for the post pitch and diameter. A filter design method derived from a synthesis technique using inductive post is presented. An experimental three-pole Chebyshev filter having 1-dB insertion loss and return loss better than 17 dB is demonstrated. Integrating such planar and nonplanar circuits on a substrate can significantly reduce size, weight, and cost, and greatly enhance manufacturing repeatability and reliability.

868 citations

Journal ArticleDOI
TL;DR: In this paper, approximate design formulas for bandpass filters using parallel coupled stripling stepped impedance resonators (SIR) are derived, taking into account the arbitrary coupling length as well as quarter-wavelength coupling.
Abstract: Approximate design formulas for bandpass filters using parallel coupled stripling stepped impedance resonators (SIR) are derived. The formulas take into account the arbitrary coupling length as well as quarter-wavelength coupling. Some advantages of this filter are its abilities to control spurious response and insertion loss by changing the structure of the resonator. Using the design formulas two experimental filters were designed and fabricated and their performances closely matched design data.

784 citations

Journal ArticleDOI
TL;DR: An ultrawideband 3.1-10.6-GHz low-noise amplifier employing an input three-section band-pass Chebyshev filter using a 0.18-/spl mu/m CMOS process achieves a power gain of 9.3 dB with an input match of -10 dB over the band.
Abstract: An ultrawideband 3.1-10.6-GHz low-noise amplifier employing an input three-section band-pass Chebyshev filter is presented. Fabricated in a 0.18-/spl mu/m CMOS process, the IC prototype achieves a power gain of 9.3 dB with an input match of -10 dB over the band, a minimum noise figure of 4 dB, and an IIP3 of -6.7 dBm while consuming 9 mW.

714 citations