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Design of cascaded all pass network with monotonous group delay response for broadband radio frequency applications

Keerthan, Prabhakar and Vinoy, Kalarickaparambil Joseph (2016) Design of cascaded all pass network with monotonous group delay response for broadband radio frequency applications. In: IET MICROWAVES ANTENNAS & PROPAGATION, 10 (7). pp. 808-815.

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Official URL: http://dx.doi.org/10.1049/iet-map.2015.0597

Abstract

In this study, an iterative procedure is developed for designing radio frequency circuits with a specified group delay dispersion (GDD) characteristics over a broad bandwidth. Second order all pass networks (APNs) are cascaded systematically over multiple stages to achieve the same. The approach is flexible enough to design circuits for various group delay responses. This is demonstrated using two-stage APN with both positive and negative slopes of linear and non-linear group delay responses for a frequency band of 500 MHz-1 GHz. The proposed multi-stage design procedure is shown to help extend the bandwidth over which a uniform resolution of frequency discrimination is possible. Practical limitations in implementing this circuit are addressed while developing the prototype. The circuit is realised as a surface mount device-based implementation of modified two-stage APN. The realised circuit has a GDD of -6 ns/GHz and an insertion loss of 1.2 dB for 500 MHz-1 GHz band. The performance parameters such as GDD, insertion loss and device footprint of the proposed approach are significantly better than previously reported.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the INST ENGINEERING TECHNOLOGY-IET, MICHAEL FARADAY HOUSE SIX HILLS WAY STEVENAGE, HERTFORD SG1 2AY, ENGLAND
Keywords: iterative methods; UHF circuits; cascaded all-pass network design; monotonous group delay response; broadband radiofrequency application; iterative procedure; radio frequency circuit design; specified group delay dispersion characteristics; specified GDD characteristics; second-order all pass networks; second-order APN; linear group delay response; nonlinear group delay response; multistage design procedure; frequency discrimination; surface mount device-based implementation; modified two-stage APN; insertion loss; frequency 500 MHz to 1 GHz; loss 1; 2 dB
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Depositing User: Id for Latest eprints
Date Deposited: 16 Jun 2016 07:52
Last Modified: 16 Jun 2016 07:52
URI: http://eprints.iisc.ac.in/id/eprint/54002

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