Computer-aided design (CAD) of filters and multiplexers for passive inter-modulation (PIM) set-ups

Soto, Pablo; Smacchia, Davide; Carceller, Carlos; Boria, Vicente E.; Guglielmi, M.

doi:10.1109/lamc.2016.7851247

Cited by 3 publications

(4 citation statements)

References 6 publications

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“…Several PIM measurement setups have been developed following the theory and guidelines described in this paper (see Sections II and III). Some of the multiplexers developed have been discussed in the technical literature as application examples of wideband design and multiplexing techniques [16], [19]. In this section, we will focus on the passive intermodulation performance of the test beds by describing the excellent results obtained in several conducted and radiated test campaigns.…”

Section: Resultsmentioning

confidence: 99%

“…Some techniques have been recently proposed for wideband multiplexing [16], reporting manufactured multiplexers with up to 6 channels and 40% relative bandwidth, suitable for PIM measurement test beds [16], [19]. However, the design issues related to the transmission and reception filters included in such multiplexing networks has not been described in depth.…”

Section: Hardware Implementationmentioning

confidence: 99%

“…Two new families of low-loss high-power bandpass filters have been recently proposed, which are suitable for this particular application [19]. They are the Hybrid Folded Rectangular Waveguide (HFRW) filters [21], [22] and the Modified Hybrid Folded Rectangular Waveguide (MHFRW) filters [23].…”

Section: A Transmission Filtersmentioning

confidence: 99%

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Advanced Compact Setups for Passive Intermodulation Measurements of Satellite Hardware

Smacchia

Soto

Boria

et al. 2018

IEEE Trans. Microwave Theory Techn.

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This paper provides the guidelines for the practical development of novel advanced test beds for passive intermodulation (PIM) measurements. The proposed test beds are highperformance and flexible, allowing for the measurement of several PIM signals of different orders, with two or more input carriers. In contrast to classic test beds for satellite hardware, based on the cascaded connection of several elements, an integrated solution involving the minimum number of hardware pieces is proposed. The result is a lower number of flanged interconnections thus reducing residual PIM level and insertion losses. In addition, return loss degradation and harmful spurious generation in the interconnections are also avoided. Measurement test beds for conducted and radiated PIM, in both transmitted and reflected directions, are discussed, highlighting the benefits and drawbacks of each configuration. Design guidelines for the key components are fully discussed. Illustrative application examples are also reported. Finally, excellent experimental results obtained from low-PIM measurement setups, working from C band to Ka band, are shown, thus fully confirming the validity of the proposed configurations. Index Terms-Intermodulation distorsion, microwave filters, high-power filters, multiplexing, computer-aided engineering. I. INTRODUCTION I N the last decades, the avoidance of passive intermodulation effects (PIM) has become a top-priority issue for communication satellites systems engineers, as a consequence of the ever more demanding payload requirements [1], [2]. PIM may, in fact, become an important source of performance degradation due to increased transmitted power levels for higher capacity links, together with the need for simultaneous operation in transmission (downlink) and in reception (uplink) at different frequency bands [3], [4]. In the scenario of Manuscript

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Section: Resultsmentioning

confidence: 99%

Section: Hardware Implementationmentioning

confidence: 99%

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Advanced Compact Setups for Passive Intermodulation Measurements of Satellite Hardware

Smacchia

Soto

Boria

et al. 2018

IEEE Trans. Microwave Theory Techn.

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“…Furthermore, the hardware must be able to withstand the high operating power usually required by HTS systems, without generating spurious PIM signals that may degrade the system performance. As a consequence, the development of adequate PIM measurement setups is a fundamental requirement [3].…”

Section: Introductionmentioning

confidence: 99%

A Wideband Diplexer for Ka-Band Passive Intermodulation Measurement

Smacchia¹,

Carceller²,

Guglielmi³

et al. 2018

2018 IEEE/MTT-S International Microwave Symposium - IMS

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In this paper we propose a novel Ka-band waveguide diplexer for passive intermodulation (PIM) measurements. Due to the higher operating frequency, this type of measurement setup usually requires wide band filters. In addition, due to the very large separation between satellite uplink and downlink bands, the PIM measurement diplexer unit must operate over a very wide frequency band. To satisfy such wide bandwidth requirements, the proposed topology is based on a band-reject filter for the downlink frequency band which is designed to provide, at the same time, the optimal passband performance for the downlink, and the optimal equiripple rejection over the PIM band. For the PIM channel, a band-pass filter combined with a high-pass section has been used. To validate the design, a prototype has been designed and manufactured. Very good agreement is shown between simulations and measurements, thereby fully validating the proposed solution.

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Design of advanced waveguide filters for passive intermodulation measurement setups

Soto

Carceller

Ruiz

et al. 2017

2017 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microw

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Computer-aided design (CAD) of filters and multiplexers for passive inter-modulation (PIM) set-ups

Cited by 3 publications

References 6 publications

Advanced Compact Setups for Passive Intermodulation Measurements of Satellite Hardware

Advanced Compact Setups for Passive Intermodulation Measurements of Satellite Hardware

A Wideband Diplexer for Ka-Band Passive Intermodulation Measurement

Design of advanced waveguide filters for passive intermodulation measurement setups

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