This work presents the design techniques to synthesize a class of compact inline quasi-elliptic-type waveguide cavity bandpass filters based on novel nonlinear frequency-variant couplings (NFVCs). These highly dispersive (FVCs) are realized by means pair partial-height posts that placed at junctions between every two resonators. Each NFVC produces transmission pole in independently adjustable zeros (TZs). Although is added overall filtering function augment its order, TZs can be each side...

Design techniques for a new class of integrated monolithic high-permittivity ceramic waveguide filters are presented. These enable size reduction 50% compared to air-filled transverse electromagnetic with the same unloaded Q-factor. Designs Chebyshev and asymmetric generalised filter diplexer presented experimental results an 1800 MHz 1700 showing excellent agreement theory.

In this work, a family of frequency-variant reactive coupling (FVRC) networks is introduced and discussed as new building blocks for the synthesis coupled-resonator bandpass filters with real or complex transmission zeros (TZs). The FVRC type nonideal frequency-dependent inverter that has nonzero elements on diagonal impedance matrix, along nonlinear frequency-variation profile its transimpedance parameter. distinctive feature these FVRCs they can be modeled simple bridged-T network...

This letter reports the design techniques for a class of inline waveguide bandpass filters with sharp-rejection capabilities at lower stopband based on novel nonlinear-frequency-variant-coupling (NFVC) structure. The proposed NFVC consists modified-T-shaped metallic post (MTP) that is placed center broad wall its open arms lying along width. engineered structure produces first-order filtering transfer function pair transmission zeros (TZs) located below passband range. To demonstrate...

Design techniques for a new class of integrated monolithic high permittivity ceramic waveguide filters are presented. These enable size reduction 50% compared to air-filled TEM with the same unloaded Q-Factor. Designs both chebyshev and asymmetric generalized filter presented, experimental results an 1800 MHz showing excellent agreement theory.

This paper presents design techniques for improving the spurious performance of an integrated ceramic waveguide filter. It is argued that these filters offer superior in terms free bandwidth when compared to Results simulations improved TEM filter and stepped impedance resonator are presented current paper.

This work presents a design technique to implement miniaturized cross-coupled bandpass filters in inline physical configurations based on triple-mode resonators. Triple-mode resonances are obtained by using integrated coaxial-waveguide cavity They consist of two coaxial conducting posts placed the sidewalls rectangular waveguide cavity. In proposed triplet, transmission zero (TZ) can be positioned at any sides passband simply locating either same wall or opposite walls Coaxial-to-waveguide...

This work presents the design techniques to realize highly compact inline generalized Chebyshev dielectric waveguide filters based on novel nonlinear frequency-variant coupling (NFVC) inverters. The discontinuities in form of a pair metalized blind holes placed at half-wavelength intervals broad wall rectangular operate as NFVC produces transmission pole between fully controllable zeros (TZs). is added passband increase order filter without augmenting its physical volume. simulated results...

This work reports a compact frequency-dependent coupling (FDC) structure introduced in rectangular waveguide, which allows to generate two additional in-band transmission poles and three zeros (TZs). serves increase the order/selectivity of waveguide bandpass filter inline topology, thus without need for any space/volume or cross coupling. The proposed FDC consists partial-height post T-shaped (P&T) that are placed side by along width waveguide. An equivalent circuit P&T is also provided...

This work presents the design techniques for generalized Chebyshev miniaturized monolithic ceramic bandpass filters. The integrated dielectric waveguide filters occupy less than 50% volume of conventional coaxial TEM Generalized filter response is achieved using metal-plated blind holes embedded at various places in slab, which provide inter-resonating couplings and/or attenuation poles same time. measured results an equivalent air-filled model are presented verification concept....

This article presents a new method of wideband dielectric measurement at microwave frequencies. can be used to determine the complex properties solid and semisolid materials from 0.9 GHz 4.5 GHz, including ISM bands 915 MHz 2450 MHz. The is based on scattering parameter stepped impedance open circuited micro-strip stub, partly loaded with test material. Current spectroscopy techniques generally measure over wide range frequencies but their accuracy limited. In contrast, narrowband high only...

This work presents the design techniques to synthesize a class of compact inline quasi-elliptic-type waveguide cavity bandpass filters based on novel nonlinear frequency-variant coupling (NFVC) inverters. These highly dispersive frequency variant couplings are realized by means pair partial height posts that placed at junctions between each two resonators. Each NFVC produces transmission pole in independently adjustable zeros (TZs). Whereas is added overall filtering function augment its...

This paper presents two new design techniques for improving the spurious performance of an integrated ceramic waveguide filter without compromising its figure-of-merit e.g. Q-factor. Non-uniform width resonators are used to spread undesired higher order mode frequencies along with TEM reducing overall cutoff frequency resonators. The proposed designs offer 60-65% better in comparison uniform filter. Simulated results a six pole Chebyshev non-uniform and evanescent presented this showing...

A novel RF interference rejection technique using four-port network is presented in this paper by two diplexers combined together. This offers the signal isolation of 68.46 dB between transmitter and receiver module, which best figure ever reported. The exploits both high low-Q factor filters for cost reduction. design tolerance with phase deviation 180 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">o</sup> 183 was investigated concept still...

This paper presents a method to improve the spurious performance of integrated ceramic waveguide filters. Non-uniform width resonator and evanescent mode resonators are employed together resonant frequencies higher order modes. The proposed designs give 75% improvement in stop band response when compared uniform filter. Simulated results two six pole chebyshev filters presented here with improved performance.

This work presents the design techniques to realize quasi-elliptic-type inline waveguide bandpass filters based on mutually-coupled rotated-dual-post (MCRDP) nonlinear frequency-variant coupling structures. A pair of closely-spaced partial-height posts placed inside allows produce a first-order filtering transfer function with two transmission zeros (TZs). The pole can be moved either below or above TZ by separating laterally along length and controlling sign mutual between posts....

Summary The aim of this article is to design a simple receiver, which can jointly estimate the frequency selective channel impulse response, independent transmit/receive IQ imbalance, and carrier offset with minimal training implementation complexity. estimation performed using 2 scalable solutions. To response we proposed different techniques. first technique an iterative approach stemming from doubly linear model transmission system in presence imbalance while second least squares...

This paper presents the design of dielectric loaded waveguide filters with wide spurious free bandwidth. Resonators non-uniform width ceramic blocks are used to spread out higher order resonances along silver plated hole/ridged in I/O resonators reduce overall size filter. The proposed designs demonstrate 2.44 times fo Simulated results for a six pole Chebyshev mixed hole filter and ridged presented exhibiting excellent performance.

Metamaterials are characterized using a modal technique for the analysis of 2N-port 2-D filter networks. It will be shown that in general, all such networks support N modes propagation each with different constants unless as TEM multiwire transmission line, inductance matrix is inverse capacitance matrix. Furthermore, simple equivalent circuit these derived, enabling complete network any combination excitations. An explicit formula derived quasi-low-pass filter. This demonstrates there...

In this paper, a synthesis method for suspended substrate stripline filters digital microwave power amplifier applications is presented. The combines lumped element and full-wave mixed approach in very efficient way. order to achieve high efficiency the filter must exhibit input impedance stopband. This has been implemented first time by using capacitively end coupled combined with stepped resonators. A third was designed. Simulations show that final stage drain of suppression out-of-band...

Abstract This work proposes a novel method for detecting the concentration of water present in liquid‐water binary mixture real time with low cost, portable measurement setup. The sensing element proposed system is two‐port microstrip bandstop resonator based on coupled line open‐ended quarter wavelength section. Voltage control oscillator and power detector ICs are used to generate detect microwave at specific frequency. Water concentrations commercially available liquids monitored both...

A four‐port diplexer consisting of two back‐to‐back three‐port diplexers combined with a 180° phase shifter in one branch is presented. The technique achieves high Tx/Rx isolation relatively low degree filters. Two experimental are demonstrated, equal Q resonators all filters and the other dissimilar factors, enabling miniaturisation cost reduction. Measured results devices at 2.13/1.73 GHz presented 40 dB achieved only second‐order