An analytical procedure is presented for the synthesis of generalized multi-band filters. The applicable to both symmetric and asymmetric frequency responses effective any number passbands stopbands. optimum equal-ripple performance obtained in each passband stopband. Prescribed real or complex transmission zeros can also be employed filtering function.

A new physical realization of an elliptic function filter response is proposed for achieving compact size, wide bandwidth, spurious free stopband and high-selectivity performance. The configuration can be implemented in conventional waveguide technology or embedded a multilayer low-temperature co-fired ceramic structure integration with other circuitry chip module. analyzed using rigorous mode matching. To validate the concept, prototypes four- six-cavity filters are designed following...

A microstrip to empty rectangular waveguide transition is presented for systems requiring a simple modular assembly with good electrical performance. The structure based on three building blocks, involving line dielectric-loaded waveguide, between and waveguides reduced height, final transformer standard waveguide. These blocks (segmentation the design point of view) are combined in parts which assembled straightforward way, without soldering. features very important signal feeders large...

With the massive integration of distributed generations (DGs), distribution networks gradually become more active and flexible. Conventional overcurrent protection is difficult to adapt such (ADNs). Current differential (CDP) a good choice for solving this issue, but multi-branch structure ADNs especially unmeasured T-connected load branch affects protection's sensitivity. Therefore, paper proposes quasi-power (QDP) scheme based on Tellegen's theorem. First, feasibility applying theorem was...

The design and experimental validation of an ultra-wideband (UWB) filter in a low temperature co-fired ceramic (LTCC) is presented. bandpass uses ridge waveguide resonators realized LTCC by printing parallel planar conductors for the top bottom walls closely spaced metal filled vias lateral walls. Filter coupling scheme stripline transitions are developed UWB requirement. mode-matching method used their design. via effect measurement setup also addressed. Finally, results nine-order (design...

The evolution of the first- and second-mode instabilities in a hypersonic flat plate boundary layer is investigated. Experiments are conducted Mach 6.5 quiet wind tunnel using particle image velocimetry, Rayleigh-scattering flow visualization, schlieren methods. Glow discharge introduced as an artificial disturbance. results show that artificially disturbance first-mode frequency range can excite specific wave one high-order harmonics added For first time, we find clear harmonic relationship...

This is the companion volume on effects of artificial disturbance transition process a boundary layer over flat plate. The with frequency in range second-mode instability introduced into by glowing discharge surface Experiments are performed using Rayleigh-scattering visualization, wall pressure pulsations measurement, and high-frequency schlieren visualization Φ300 mm hypersonic quiet wind tunnel at Peking University. It found that waves stimulated remarkably disturbance, triggered...

A novel double-layer coupled stripline resonator structure is introduced to realize miniature broadband bandpass filters. Filters with relative bandwidth up 60% and size less than /spl lambda//8/spl times//spl times/h (/spl lambda/ wavelength at the midband frequency; h substrate height, which much smaller lambda//8) can be fulfilled using such resonators. Two possible filter configurations are proposed in this paper: combline interdigital. The synthesis procedure follows classical coupling...

The design of bit crown is an important part polycrystalline diamond compact (PDC) design, although predecessors have done a lot researches on the principles PDC crown, study law about rock-breaking energy consumption according to different shape not very systematic, and mathematical model over-simplified. In order analyze relation between quantificationally, paper puts forward idea take "per revolution-specific work" as objective function, analyzes relationship rock properties, inner cone...

High-definition (HD) map provides abundant and precise static environmental information of the driving scene, serving as a fundamental indispensable component for planning in autonomous system. In this paper, we present \textbf{Map} \textbf{TR}ansformer, an end-to-end framework online vectorized HD construction. We propose unified permutation-equivalent modeling approach, \ie, element point set with group equivalent permutations, which accurately describes shape stabilizes learning process....

A new canonical ridge waveguide structure is proposed to design elliptic filter responses. The non-adjacent cavities are coupled by windows situated at the common narrow-wall of enclosures. This configuration provides positive and negative cross couplings using evanescent rectangular waveguides metallic strips, respectively. full-wave analysis carried out a rigorous mode matching method. based on circuit synthesis optimization. Finally, elucidated with four-pole it validated commercial HFSS software

Multi-layer coupled strip-resonators are proposed for the design of miniature filters in LTCC technology. Strong capacitive couplings between strips at different layers introduced such resonators to significantly reduce resonator size. The full-wave numerical method Sonnet and equivalent circuit models used investigate characteristics multi-layer resonators. Two filter examples using triple-layer stripline double-layer hairpin presented validate feasibility designs

Dual-Mode filters are used in applications where low mass and volume required. In this paper, the Computer Aided Design of a new rectangular waveguide filter structure is proposed for achieving dual-mode operation. It preserves longitudinal inline topology classical circular configuration, which can provide quasi-elliptic function responses. However, it has no coupling or tuning screws exclusively made up sections aligned waveguides. This leads to very efficient full-wave analysis based on...

High-definition (HD) map serves as the essential infrastructure of autonomous driving. In this work, we build up a systematic vectorized annotation framework (termed VMA) for efficiently generating HD large-scale driving scene. We design divide-and-conquer scheme to solve spatial extensibility problem generation, and abstract elements with variety geometric patterns unified point sequence representation, which can be extended most in VMA is highly efficient extensible, requiring negligible...

A miniature broad-band bandpass filter with size less than lambda/8 times h (lambda is wavelength at the midband frequency; substrate height, much smaller lambda/8), employing broadside-coupled strip-line resonators introduced. Such can be used to design combline and interdigital filters of very wide relative bandwidth. The synthesis procedure follows classical coupling matrix approach, which generates good initial responses. Optimization by mode matching method (MMM) fine-tuning in HFSS are...

The analysis of multi-coupled strip-line filters by the mode-matching method is studied for different input/output excitations. aim to compare computational effort two options and propose most suitable formulation design some filters. It shown that a segmentation structure essential obtaining good numerical results. In fact, if optimum selected, using only TEM modes can resemble full-wave response, with shorter computation time. Hence, this approach be very useful in examples are validate...

With the increasing penetration of distributed generation (DG) in distribution networks, its impact on stability grid has become more pronounced. To improve low voltage ride-through (LVRT) capability DG, a LVRT control strategy for improving reactive power support DG is proposed. This designs two output current equations as based requirements different positive sequence voltages at point common coupling (PCC) DG. By comparing positive-sequence PCC with boundary corresponding equation...

A new branch-line directional coupler is proposed for achieving wide bandwidth. The device implemented in ridge waveguide to exploit its monomode band. It can be physically realized either empty or LTCC integration a chip module. Two prototypes of two and five branches are designed following systematic procedure. An appropriate equivalent circuit provides initial dimensions the desired optimum response obtained by means final full-wave optimization based on rigorous efficient Mode-Matching...

Ridge waveguide divider junctions are introduced and applied to wide-band multiplexer applications. A rigorous analysis optimization process by mode matching method (MMM) is employed design the that yield low reflection coefficient in common port almost equal transmission coefficients other two ports over a wide frequency band. Two examples of diplexer triplexer using such presented. All components involved diplexer/triplexer designs rigorously modeled cascaded MMM. Optimization procedures...