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Phase splitter

About: Phase splitter is a research topic. Over the lifetime, 726 publications have been published within this topic receiving 7438 citations.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the electromagnetic fields associated with a beam splitter having two input arms and two output arms are quantized in terms of the spatial modes of the complete optical system.

148 citations

Journal ArticleDOI
TL;DR: In this article, a quadrature splitter based on injection locking a cascade of ring oscillators to a low-phase-noise (external) single-phase reference clock was proposed.
Abstract: We describe a novel quadrature splitter based on injection locking a cascade of ring oscillators to a low-phase-noise (external) single-phase reference clock. The output signals are in accurate quadrature with low phase noise over a wide bandwidth. This scheme inherently operates at high signal frequencies and is insensitive to the shape of the reference clock waveform. Experimental results at 2.7 GHz are reported for a prototype implementation in 0.25-/spl mu/m BiCMOS technology. To prove the viability of this scheme, a single-sideband upconverter was implemented along with the splitter. Over several chips, an average sideband suppression better than 45 dB over a large signal bandwidth of 100 MHz was achieved.

143 citations

Journal ArticleDOI
TL;DR: In this paper, the authors focus on the analysis of splitter/combiner microstrip sections where each branch is loaded with a complementary split ring resonator (CSRR), and a model that includes lumped elements (accounting for the CSRR-loaded line sections) and distributed components (corresponding to the transmission lines) is proposed and used to infer the position of the transmission zeros.
Abstract: This paper focuses on the analysis of splitter/ combiner microstrip sections where each branch is loaded with a complementary split ring resonator (CSRR). The distance between CSRRs is high, and hence, their coupling can be neglected. If the structure exhibits perfect symmetry with regard to the axial plane, a single transmission zero (notch) at the fundamental resonance of the CSRR, arises. Conversely, two notches (i.e., frequency splitting) appear if symmetry is disrupted, and their positions are determined not only by the characteristics of the CSRRs but also by the length of the splitter/combiner sections. A model that includes lumped elements (accounting for the CSRR-loaded line sections) and distributed components (corresponding to the transmission lines) is proposed and used to infer the position of the transmission zeros. Frequency splitting is useful for the implementation of differential sensors and comparators based on symmetry disruption. Using the model, the length of the splitter/combiner sections necessary to optimize the sensitivity of the structures as sensing elements is determined. Parameter extraction and comparison with electromagnetic simulations and measurements in several symmetric and asymmetric structures is used to validate the model. Finally, a prototype device sensor/comparator based on the proposed CSRR-loaded splitter/combiner microstrip sections is presented.

141 citations

Patent
07 Jun 2004
TL;DR: In this article, the RFID antenna module is formed with a transmission line coupled to an RF phase splitter, where in one embodiment, the transmission line is formed from two parallel conductive strips.
Abstract: An RFID label with embedded tag is passed through an RFID antenna in a printer system, where the RFID antenna allows a roll of such labels to pass in close proximity to the antenna and still allow each individual RFID tag to be read and/or programmed. The RFID antenna module is formed with a transmission line coupled to an RF phase splitter, where in one embodiment, the transmission line is formed from two parallel conductive strips.

138 citations

Patent
Jack Glas1
25 Sep 1998
TL;DR: In this article, a phase splitter compensation unit is coupled to the radio-frequency mixing stage and is configured to multiply the in-phase and quadrature phase signals provided by the RF mixing stage by a predetermined compensation factor.
Abstract: In a communications terminal that has an image reject mixing arrangement, a compensation system provides compensation for phase and amplitude imbalances, which are caused by a demodulating local oscillator employed in the communications terminal. The image reject mixing arrangement comprises a radio-frequency (RF) mixing stage including an in-phase and a quadrature phase branch, which is configured to receive a radio frequency signal and down convert the radio frequency signal to in-phase and quadrature phase intermediate frequency (IF) signals. It also includes a phase splitter unit coupled to the radio-frequency (RF) mixing stage and configured to provide an in-phase local oscillator signal and a quadrature phase local oscillator signal to the RF mixing stage. The phase splitter causes an amplitude imbalance signal Δ and a phase imbalance signal φ to be generated in the in-phase and quadrature phase branch of the RF mixing stage. A phase splitter compensation unit is coupled to the RF mixing stage and is configured to multiply the in-phase and quadrature phase signals provided by the RF mixing stage by a predetermined compensation factor. An intermediate frequency (IF) mixing stage is coupled to the radio-frequency mixing stage via the phase splitter compensation unit. The IF mixing stage is configured to convert the intermediate signals received from the RF mixing stage to base band frequency region.

122 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20203
20194
20183
201718
201625
201534