3-dB directional coupler
A Compact h -Plane Magic Tee Designed at W Band
... Fig. 3(a)),then connect two such directional couplers to get a − 3 dB directional coupler (twelve slots),and the scattering parameter of the − 3 dB NWSDC is shown ...
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The Circuit and Network Analysis of Some Signal Separation Structures Constituting Microwave Six Port Reflectometers
... in-phase 3 dB directional coupler, a completely different procedure to that used in sections II and III to design the four-port couplers, is ...in-phase 3 dB coupler is ...
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An Improved Design of Dual-Band 3 dB 180° Directional Coupler
... and directional couplers [18, 19] are key components for radio frequency (RF) transceiver ...◦ coupler (or rat-race coupler) [4] is constructed by transmission lines with entire ring circumference of ...
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A Semi-Elliptical Wideband Directional Coupler
... wideband directional couplers using a semi-elliptical edge-coupled structure is ...the coupler on substrate with dielectric constants of ...parallel-microstrip coupler which requires extremely narrow ...
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Directional Coupler Using Multi-Stage Coupled Structure Theory
... Section 3, it can be found that the coupling degree: 50.4 ± 0.35 dB, the coupling flatness within ...±0.35 dB and reduced 1.3 dB compared with the project technical indicators in full ...76 ...
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Design of Multilayer and Multiline Microstrip Directional Coupler with Closed Form Relations
... Several prototypes have been built and tested after verification of the results between analytical and simulation values. Based on the analytical, simulation and measurement results, the design method proved to be an ...
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MoM Analysis and Design of a Compact Coaxial to Microstrip Directional Coupler
... the coupler using an adapted numerical model. The coupler can be integrated into a printed circuit board (PCB) and operates over 17 to 35 dB coupling coefficients and is always ...compact ...
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Miniaturization of Broadband 3-dB Branch-Line Coupler
... The 3-dB branch-line directional coupler is the fundamental component in planar microwave-integrated circuit and may find numerous applications in microwave ...broadband 3-dB ...
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A Miniaturized 3-dB Microstrip TRD Coupled-Line Rat-Race Coupler with Harmonics Suppression
... rat-race coupler with harmonics suppression is proposed by using shorted trans-directional (TRD) coupled ...the 3 λ/ 4 uniform transmission-line section (UTLS) in the traditional 3 λ/ 2 ring ...
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A REVIEW ON DIRECTIONAL COUPLERS WITH INTRODUCTION OF TRANSMISSION LINES IN BETWEEN COUPLED LINE SECTIONS
... The performance of this design is evident with tight coupling coefficient and high-directivity performance which can be replicated in a PCB microstrip structure. This could be achieved due to flexible parameters and the ...
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Design study of a fundamental mode input coupler for a 372-GHz gyro-TWA I : rectangular-to-circular coupling methods
... input coupler was also evaluated through numer- ical ...multiple-aperture coupler is, unlike the three-port designs described in Section II, a four-port device consisting of two transmission lines ...
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Substrate Integrated Waveguide Directional Coupler in Ku and Ka Bands
... (SIW) directional couplers for Ku and Ka bands are ...design directional coupler -3 db follow substrate integrated waveguide selection and aperture coupling theory as known from ...
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Analysis and Design of an Ultra Wideband Directional Coupler
... with a rectangular slot (4 GHz) reported in [8]. The average value of the coupling for the direct port and the coupled port is 3.5 dB, and the return loss and isolation are better than 20 dB within the ...
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EC2403-RF-and-Microwave-Engineering-Lecture-Notes
... the directional coupler can be used to obtain the information ...(i.e. 3 dB below the input power level), the power on the main transmission line is also 3 dB below the input ...
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Photonic Crystal Directional Coupler Based Optomechanical Sensor
... With good linearity, dynamic range, and low cost, piezoresistive sensors represent the most popular choice for pressure sensing applications. As the name suggests, these sensors rely on the piezoresistive e ff ect where ...
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Bio-inspired sound localization sensor with high directional sensitivity
... the directional sensitivity of a device at the point of dual optimization is consistent for most damping conditions, frequencies of operation and membrane sizes, it is demonstrated that restricting the angular ...
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Influence of Directional Coupler Position on Power Detection Accuracy
... the directional coupler in different positions are carried out to determine the optimal position of the directional ...the directional coupler in the design of the actual power ...
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Multi Section Coupled Line Directional Couplers Design
... The results which are presented in chapter 5 are belongs to three types of coupled line directional couplers A, B and C. based on these results one can may estimate that which coupler is proffered one among ...
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A high efficiency input/output coupler for small silicon photonic devices
... Abstract: Coupling light from an optical fibre to small optical waveguides is particularly problematic in semiconductors, since the refractive index of the silica fibre is very different from that of a semiconductor ...
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ANALYSIS OF DIRECTIONAL COUPLER WITH SYMMETRICAL ADJACENT PARALLEL WAVEGUIDES USING BEAM PROPAGATION METHOD
... where Δβ is the difference of the propagation constant of the even and odd modes of the structure. Figure 7 shows a plot of coupling length vs separation distance between two slabs of the directional couple. The ...
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