Synthesis of Microwave Filters by Inverse Scattering Using a Closed-Form Expression Valid for Rational Frequency Responses

Arnedo, I.; Arregui, I.; Lujambio, A.; Chudzik, M.; Laso, M.A.G.; Lopetegi, T.

doi:10.1109/tmtt.2012.2187921

Cited by 17 publications

(28 citation statements)

References 47 publications

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“…In the case that the target frequency response can be expressed as a rational function, a fast synthesis method can be derived [21]. We will assume that 11 ( ) is a rational function that can be written as a quotient of polynomials as follows:…”

Section: General Microwave Synthesis Technique For Rational Frequencymentioning

confidence: 99%

“…, − * . Then, 1 ( , ) and 2 ( , ) can be expressed as a linear combination of entire functions [21] and, thus, the sought analytical closed-form expression for the coupling coefficient, ( ), of the microwave structure that satisfies the target frequency response is obtained [21]:…”

Section: General Microwave Synthesis Technique For Rational Frequencymentioning

confidence: 99%

“…The specifications are passbands from 8 GHz to 11.4 GHz and from 18.9 GHz up to 22.5 GHz with return losses better than 20 dB and a rejected band from 13 GHz to 16.3 GHz with a rejection level higher than 60 dB. A bandpass frequency response following a Cauer (Elliptic) approximation [21,31] will be used for the 11 parameter (a bandstop frequency response will result for the 21 parameter). The order necessary for the approximation will be 14, and Figure 15: A coronal slice of the reconstructed 3D image of the realistically shaped adipose breast phantom using the designed pulse shaper.…”

Section: Robust Filter Design Tool: a Cauer Filter Examplementioning

confidence: 99%

“…the passband will extend from 13.1 GHz up to 16.2 GHz, with a passband ripple of 10 −9 dB and a rejected band ripple of 25 dB. From the magnitude of the 11 parameter, the magnitude of the 21 can be immediately obtained by using (12), and a bandstop frequency response results for the 21 parameter, with a rejected band attenuation of 67 dB.…”

Section: Robust Filter Design Tool: a Cauer Filter Examplementioning

confidence: 99%

See 3 more Smart Citations

Passive Microwave Component Design Using Inverse Scattering: Theory and Applications

Arnedo

Arregui

Chudzik

et al. 2013

International Journal of Antennas and Propagation

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We briefly review different synthesis techniques for the design of passive microwave components with arbitrary frequency response, developed by our group during the last decade. We provide the theoretical foundations based on inverse scattering and coupledmode theory as well as several applications where the devices designed following those techniques have been successfully tested. The main characteristics of these synthesis methods are as follows. (a) They are direct, because it is not necessary to use lumpedelement circuit models; just the target frequency response is the starting point. (b) They are exact, as there is neither spurious bands nor degradation in the frequency response; hence, there is no bandwidth limitation. (c) They are flexible, because they are valid for any causal, stable, and passive transfer function; only inviolable physical principles must be guaranteed. A myriad of examples has been presented by our group in many different technologies for very relevant applications such as harmonic control of amplifiers, directional coupler with enhanced directivity and coupling, transmission-type dispersive delay lines for phase engineering, compact design of high-power spurious free low-pass waveguide filters for satellite payloads, pulse shapers for advanced UWB radar and communications and for novel breast cancer detection systems, transmission-type Nth-order differentiators for tunable pulse generation, and a robust filter design tool.

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Section: General Microwave Synthesis Technique For Rational Frequencymentioning

confidence: 99%

Section: General Microwave Synthesis Technique For Rational Frequencymentioning

confidence: 99%

Section: Robust Filter Design Tool: a Cauer Filter Examplementioning

confidence: 99%

Section: Robust Filter Design Tool: a Cauer Filter Examplementioning

confidence: 99%

See 2 more Smart Citations

Passive Microwave Component Design Using Inverse Scattering: Theory and Applications

Arnedo

Arregui

Chudzik

et al. 2013

International Journal of Antennas and Propagation

Self Cite

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“…The method was validated in the microwave range for several technologies such as microstrip [8], rectangular waveguide [9], and coupled lines [10]. Here, the extension to the terahertz domain is presented.…”

Section: Introductionmentioning

confidence: 99%

Pulse shaping for millimeter-wave and terahertz applications in coplanar technology

Chudzik

Arnedo

Arregui

et al. 2014

2014 44th European Microwave Conference

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In this work, a pulse shaper in coplanar technology intended for the unlicensed band up to the THz region is designed, fabricated, and measured. This broadband frequency range is of great interests as it offers very high data rate communication in local area networks. The technique employs tailored coplanar lines that have been designed using an exact analytical series solution of the synthesis problem derived from the coupled-mode theory. The frequency response of the pulse-shaping device introduced in the synthesis method depends on the spectrum of the applied THz impulse generator, application-dependent devices (e.g. antenna) with known responses, and desired THz output response. Here, the desired output pulse is a combination of Hermite polynomials with 5 ps of temporal duration. The designed device has been simulated in the frequency domain and the obtained result of the S 11 parameter has been used in the time domain calculation of the output pulse giving good accordance with the desired THz pulse. The prototype has been fabricated with gold metallization on HR-Si substrate by e-beam lithography and lift-off process. A downscaled version with spectral content up to 0.3 THz is also fabricated and measured validating each component of the system.

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WITHDRAWN: A Miniaturized Bandpass Filter using Microstrip Lines

Kavithadevi

Umadevi

Baligar

2020

Materials Today: Proceedings

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Synthesis of Microwave Filters by Inverse Scattering Using a Closed-Form Expression Valid for Rational Frequency Responses

Cited by 17 publications

References 47 publications

Passive Microwave Component Design Using Inverse Scattering: Theory and Applications

Passive Microwave Component Design Using Inverse Scattering: Theory and Applications

Pulse shaping for millimeter-wave and terahertz applications in coplanar technology

WITHDRAWN: A Miniaturized Bandpass Filter using Microstrip Lines

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