Advanced microwave technologies for smart flexible satellite

Chan, Hsun-Wei

doi:10.1109/mwsym.2011.5972989

Cited by 6 publications

(2 citation statements)

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“…Next-generation satellite-communication receivers demand advanced microwave and intermediate-frequency (IF) electronics with reduced volume/size and capable of operating for different signal conditions [1], [2]. In the case of bandpass filters (BPFs) and multiplexing devices as they are the basic signal-preselection components for such systems, the future trend is to replace-when possible-bulky waveguide-and cavity-resonator-based frequency-static BPFs and switchable-filter-banks/channelizers by planar implementations.…”

Section: Introductionmentioning

confidence: 99%

High-Order Planar Bandpass Filters With Electronically-Reconfigurable Passband Width and Flatness Based on Adaptive Multi-Resonator Cascades

et al. 2019

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A class of quasi-elliptic-type planar bandpass filters (BPFs) with electronically controllable bandwidth between narrow-band and ultra-wideband states and enhanced passband flatness is reported. It consists of the in-series cascade of replicas of an adaptive BPF stage that exhibits three in-band poles and two transmission zeros (TZs). In this manner, BPF transfer functions with 3K poles and multiple TZs-between two K-multiplicity and 2K one-multiplicity TZs-without cross-coupling can be synthesized with a K-stage BPF architecture. Bandwidth reconfiguration is performed through the spectrally agile allocation of these TZs. Passband flattening for all the states is accomplished through the adjustment of the BPF in-band return-loss profile by tuning the external admittance inverters and those between BPF stages. The aforementioned procedures for bandwidth control and passband flattening are theoretically demonstrated with the coupling-routing diagram formalism. Furthermore, a mechanism to avoid the appearance of out-of-band spurious peaks due to the multi-stage in-series-cascade process in the associated transmissionline-based BPF implementation is described. For experimental-validation purposes, a 1-GHz sixth-order varactor-tuned BPF microstrip prototype with measured flattened 1-dB referred passband-width states going from 46 to 482 MHz-measured bandwidth tuning ratio of 11.5:1-is developed and characterized. Measurements for various temperature conditions and their in situ compensation are also shown. INDEX TERMS Bandpass filter (BPF), bandwidth control, electronically-controllable filter, intermediatefrequency (IF) filter, microstrip filter, multi-functional filter, passband flattening, reconfigurable filter, satellite-communication receiver, transmission zero (TZ), tunable filter, varactor-tuned filter.

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Section: Introductionmentioning

confidence: 99%

High-Order Planar Bandpass Filters With Electronically-Reconfigurable Passband Width and Flatness Based on Adaptive Multi-Resonator Cascades

et al. 2019

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“…But the transmit and receive signals of satellite communication have very large attenuation because between earth station and space station distance are as much as 10,000 km or more and climate, rainfall. In addition, it is important for the design of the antenna and RF system to eliminate interference of the interaction between the adjacent satellite and the target satellite .…”

Section: Introductionmentioning

confidence: 99%

Antenna and RF system for fly‐away satellite terminal communication applications on Ka‐band

Park¹,

Kim²,

Lee³

et al. 2016

Micro & Optical Tech Letters

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Antenna and RF system for fly‐away satellite terminal communication applications on ka‐band is presented in this article. Fly‐away satellite terminals 1 or 2 people is fixed by installing motion terminal, movement and installation of equipment, and ease of operation to the user's for low‐power consumption, small size, and light weight is important. For low‐power consumption and compact and light‐weight, dual‐reflector antenna system volume using dual‐offset Gregorian antenna structure is minimized, magnesium by weight is minimized. Transmitter part of RF systems has low‐power consumption and compact light weight using the pHEMT MMIC compound devices. For harmonic rejection, the photonic band‐gap low‐pass‐filter is designed. In receiver part, low‐noise amplifier and down converter rolled into one function of the low‐noise block converter structure is designed for compact and light weight. In this article, fly‐away satellite terminal with low‐power consumption and compact light weight is described by antenna system and RF system performances. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2020–2025, 2016

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Communications Satellite RF payload technologies evolution: A system perspective

Gupta¹

2016

2016 Asia-Pacific Microwave Conference (APMC)

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Advanced microwave technologies for smart flexible satellite

Cited by 6 publications

References 0 publications

High-Order Planar Bandpass Filters With Electronically-Reconfigurable Passband Width and Flatness Based on Adaptive Multi-Resonator Cascades

High-Order Planar Bandpass Filters With Electronically-Reconfigurable Passband Width and Flatness Based on Adaptive Multi-Resonator Cascades

Antenna and RF system for fly‐away satellite terminal communication applications on Ka‐band

Communications Satellite RF payload technologies evolution: A system perspective

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