Topic
Return loss
About: Return loss is a research topic. Over the lifetime, 11090 publications have been published within this topic receiving 97603 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, a four-way microstrip power divider with bandpass filtering response was designed with a generalized Chebyshev response, where frequency-dependent couplings were utilized.
Abstract: A four-way microstrip power divider is designed with bandpass filtering response The synthesized inline filter has a generalized Chebyshev response, where frequency-dependent couplings are utilized All of the critical parameters, including the characteristic impedances and electrical lengths, can be determined by our derived closed-form formulas By extending the inline filter, the configuration of four-way power divider is obtained Then, three isolation resistors are properly selected according to the even-/odd-mode analysis The proposed four-way filtering power divider has low in-band insertion loss and high frequency selectivity It can provide the in-band return loss and isolation between outputs better than 167 and 175 dB, respectively
69 citations
TL;DR: In this article, a miniaturized ultra-wideband bandpass filter integrated with tunable notch filters using a silicon-based integrated passive device technology is implemented on a micromachined silicon substrate, showing an insertion loss of 11 dB, return loss of better than 15 dB, and attenuation of more than 30 dB at both lower and upper stop-bands.
Abstract: This paper reports on the implementation of miniaturized ultra-wideband filters integrated with tunable notch filters using a silicon-based integrated passive device technology An ultra-wideband bandpass filter is realized on a micromachined silicon substrate, showing an insertion loss of 11 dB, return loss of better than 15 dB, and attenuation of more than 30 dB at both lower and upper stop-bands, with a spurious-free response up to 40 GHz The filter occupies only 29 mm 24 mm of die area To address the in-band interference issues associated with ultra-wideband communication, very compact tunable notch filters are monolithically integrated with the bandpass filters A two-pole tunable notch filter integrated with an ultra-wideband filter provides more than 20 dB rejection in the 5-6 GHz range to reject U-NII interferences, with a total footprint of 48 mm 29 mm The power handling, linearity, and temperature stability of filters are characterized and presented in this paper
68 citations
12 Jun 1974
TL;DR: In certain types of circuits, time-domain data can be used to reconstruct the frequency-domain response data in an approximate manner for separate parts of a network without separate measurements, so the interference of generator, load, and transducer mismatches can be substantially reduced.
Abstract: Oscillographic plots of various time-domain responses of microwave networks are generated by computer simulation, based upon measurements taken in the frequency domain. Frequency-response data are obtained with a computer-controlled automatic network analyzer, this information is processed in an associated computer, and selected time-domain responses are plotted immediately on an x-y recorder. Voltage versus time responses have been simulated for various excitations includlng impulse, step, and pulse-modulated RF waves. When impedance data are used, the plots are interpretable as from a time-domain reflectometer with high precision, high sensitivity, and high resolving power. As an oscillograph the rise time may be as short as 0.04 ns. In transmission 70 dB or more loss can be tolerated. In reflection measurements, the results are interpretable for discrete discontinuities with 40 dB or more return loss, and with separations on the order of 1 cm in space. In certain types of circuits, time-domain data can be used to reconstruct the frequency-domain response data in an approximate manner for separate parts of a network without separate measurements. In this manner, the interference of generator, load, and transducer mismatches can be substantially reduced.
68 citations
TL;DR: In this article, a CPW-fed inductively coupled bow-tie slot antenna is proposed for 2.45 GHz and 5.5 GHz frequency bands with 10 dB return loss.
Abstract: A CPW-fed inductively coupled bow-tie slot antenna is introduced. The bandwidth reduction for an inductively coupled straight-dipole slot is overcome by utilizing a bow-tie slot. Antennas operating at 2.45 and 5.5 GHz are proposed that have 10 dB return loss bandwidths of 12% and 17%, respectively. Prototype antenna elements and a two-element series-fed array were fabricated and tested to validate performance.
68 citations
TL;DR: In this article, a printed microstrip-line-fed printed rhombus slot antenna with a pair of parasitic strips is presented, which can provide PCS, IMT-2000, and WiMAX multiband operations for various wireless communication services.
Abstract: In this paper, a printed microstrip-line-fed rhombus slot antenna with a pair of parasitic strips is presented. With the use of these parasitic elements along the microstrip feed line, bandwidth enhancement for wideband operation can be obtained. From experimental results, the measured impedance bandwidth, with a 10 dB return loss, can operate from 1.80 to 6.09 GHz which is wider than a conventional microstrip-line-fed printed rhombus slot antenna without parasitic elements. By selecting proper dimensions of parasitic strips, the proposed antenna can provide PCS, IMT-2000, and WiMAX multiband operations for various wireless communication services. Details of the proposed antenna are described, and experimental results are presented and discussed.
68 citations