The paper presents a universal and comprehensive synthesis technique of coupled resonator filters with source/load-multiresonator coupling. approach is based on repeated analyses circuit the desired topology; no similarity transformation needed. Restrictions imposed by implementation coupling coefficients such as signs orders magnitudes are straightforwardly handled within this technique. then used to synthesize design full or almost matrices selecting, among infinite number solutions,...

This paper presents a new set of results concerning the use higher/lower order modes as means to implement bypass or cross coupling for applications in elliptic filter design. It is shown that signs coefficients produce transmission zero (TZ) either below above passband are, certain situations, reversed from predictions simpler existing models. In particular, must be significantly stronger than main resonance generate TZs immediate vicinity passband. Planar (H-plane) singlets are used...

The singlet, which contains one resonator and generates transmission zero, is introduced as the most basic building block for modular design of elliptic filters. Higher-order filters are designed by cascading singlets to generate required zeros. A novel model, nonresonating node model (NRNM), both resonating nodes then introduced. allows a high level modularity in Example measured validate approach.

This paper introduces building blocks for modular design of elliptic, pseudoelliptic, and self-equalized filters. The first block is second order generates two transmission zeros (TZs), which are either on the real or imaginary axis. Moving from axis (linear phase response) to (attenuation poles) requires changing sign one coupling coefficient. a structure three, called extended doublet, allows generation TZs practically anywhere in complex plane. An important property this its ability move...

This paper introduces novel coupling schemes for microwave resonator filters. It is shown that higher order filter characteristics can be obtained from lower sections, which are connected in parallel between the source and load, by proper superposition of individual responses. property used modular design focusing on separate sections one at a time. In addition, some these exhibit zero-shifting properties, whereby transmission zeros shifted side passband to other simply changing resonant...

This paper presents a new class of pseudoelliptic function filters that are based on compact inline TM/sub 110/-mode cavity configurations. No structural folding is required. The bypass couplings implemented through the nonresonating TE/sub 10/01/ modes so arbitrarily positioned transmission zeros can be implemented. Design guidelines to generate given zero desired side passband and how control it presented. To demonstrate its flexibility, approach illustrated at examples four-pole providing...

The paper presents novel coupling schemes for microwave resonator filters. Some of these solutions contain more than one main path between the input and output. These paths may be interacting or non-interacting. In other solutions, only some direct (main) couplings are zero. It is shown that higher-order filter characteristics can obtained from lower-order sections, which connected in parallel source load, by proper superposition individual responses. Possible applications solution to actual...

A frequency-selective power combiner/divider in single-layer substrate integrated waveguide (SIW) technology is introduced. The basic building block consists of a planar four cavity structure with three them operated SIW TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">101</sub> modes and one xmlns:xlink="http://www.w3.org/1999/xlink">201</sub> mode. Each coupled to port the unit. In addition overall configuration considers couplings each...

A direct synthesis and design technique of pseudoelliptic in-line filters with one or two real transmission zeros (TZs) is presented. It shown that the phase reflection coefficient must be properly uniquely determined for to succeed. The TZs (attenuation poles) are brought about independently controlled by dedicated resonators at input output. Each attenuation pole located resonant frequency its resonator. Frequency-independent reactances output used replace shifts in extracted-pole...

Compact multi-port power combiners and dividers with filter characteristics are introduced. These components advantageously combine the functions of distribution filtering in a single component, thus reducing number system improving overall performance. The design principle, which is entirely based on theory, first presented for symmetric four-port combiner/divider then extended to an eight-port network. Measurements all-metal waveguide prototype show excellent agreement simulations validate...

A new coupling method based on the utilisation of cavity transfonnation properties is established for planar waveguide (H-plane) TE10n/TEn01 mode filters. This shown to provide realisation elliptic function responses by structures, although these configurations exclusively exhibit magnetic iris couplings. Moreover, flexibility in design arbitrary filter characteristics essentially extended this class The approach verified a five-pole pseudo millimetre wave band.

A direct synthesis technique of a new class bandstop coupled resonator elliptic filters is presented. Two different coupling schemes, which both include source-load are used. The first and routing scheme the standard folded structure used in implementing bandpass with N transmission zeros using resonators. second identical to multipath parallel structure, was recently introduced for fully filters. In cases, source load directly by an inverter order generate required zeros. It shown that,...

A novel band-reject element for the design of inline waveguide pseudoelliptic filters is introduced. The consists an offset partial-height post in a rectangular which dominant TE <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">10</sub> mode propagating. location attenuation pole primarily determined by height that generates it. allows implementation weak, as well strong coupling coefficients are encountered asymmetric responses with broad...

This paper presents new in-line pseudoelliptic bandpass filters with nonresonating nodes. Microwave based on dual- and triple-mode cavities are introduced. In each case, the transmission zeros (TZs) individually generated controlled by dedicated resonators. Dual- kept homogeneous contain no coupling or tuning elements. A third-order filter a TZ extracted at its center is designed cascading two dual-mode cavities. direct design technique of this introduced shown to produce accurate initial...

The mode-matching technique (MMT) is employed to analyze and design the transition from substrate integrated waveguides (SIWs) mounted (SMWs) that are on top and/or at bottom of substrate. Coupling between layers facilitated by apertures thickness substrate's metallization. By appropriately segmenting transition, a simple fast MMT routine developed. results obtained for single waveguide resonator agree well with simulations in CST HFSS and, thus, validate code. Furthermore, extended...

A universal building block for modular design of microwave filters is introduced. The second order contains two resonators which are not coupled to each other. By adjusting the strengths and signs its coupling coefficients, can be used bandpass, bandstop linear-phase filters. For bandpass filters, Chebychev as well symmetric asymmetric pseudo-elliptic responses with one or finite transmission zeros designed. placed practically anywhere in complex plane long realizability condition met....

The paper presents a new building block for modular design of elliptic filters. block, called doublet, contains two resonators which generate one transmission zero on either side the passband. Higher-order filters can be designed by cascading doublets similarly to cascade triplets and quads. doublet exhibits some interesting zero-shifting features are not present in Some these discussed connection with all-inductive rectangular waveguides. waveguide technology also presented along...

A novel TE113 dual mode cavity filter design is introduced that provides remote controlled reallocation of center frequency and bandwidth. The reconfiguration principle1 considers both end-walls the cavities to be independently moveable along axes. This allows convenient control resonance frequencies (cavity length) couplings (i.e., field strength in front coupling means inside cavity). Higher order filters are realized by side-wall arrangements using synchronous movement all with only two...

This letter presents coupling schemes and design guidelines for dual-mode filters without intracavity couplings. Examples of orders two four are presented to document the flexibility these solutions. These allow change transmission zeros from either side passband other by only detuning resonators changing coefficients.

In-line pseudoelliptic band-reject filters with nonresonating nodes (NRNs) and/or phase shifts are introduced. It is shown that general arbitrarily placed reflection zeros (RZs) can be designed by both classes. A more low-pass network, which contains NRNs and shifts, Prior to implementation, the includes optimized take into account dispersion effects better fit specifications. Example in microstrip waveguide technologies presented. Experimental validation of method demonstrated a novel...

A novel multiplexing and double band filtering (DBF) method is established. DBF refers to two-port equipment which serves two transmit frequency channels simultaneously. The methods build on frequency-independent resonance modes, excited within a common multimode cavity (CMC), are assigned different channel filters. design principles presented for cylindrical CMCs by way of example. It shown that combining with advanced coupling produces multitude new variants. Initial experimental results...

A theoretical study concerning a 5-channel TUnable manifold MUltipleXer (TUMUX) design has been performed using an appropriate modelling method. The findings yielded possible TUMUX configuration. well-suited filter type realized for such application providing low loss, small size and good properties relative to tuning. favourable use of TUMUXs is demonstrated by proposed common spare payload various national European Direct Broadcasting Satellites.

Corrugated-waveguide low-pass filters are analysed by successive reflection coefficient transformations. The discontinuities modelled waveguide equivalent circuits, including interaction of higher order modes. filter response is determined TEm0-transfer functions (m=1,2...) each which can be calculated independently. Implementing this method in an optimization routine allows complete computer-aided design according to given specifications.