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A novel dual-mode circular patch resonator (DMCPR) is proposed to design a high characteristic bandpass filter (BPF) with controllable transmission zeros (TZs) based on Substrate Integrated Suspended Line (SISL) technology. The inherent degenerate modes of a circular patch adopted to achieve the DMCPR are separated and controlled by two embedded notches. Three TZs at upper and lower sidebands of the...
This paper investigates and compares the via-coupling and gap-coupling mechanisms in end-coupled structures, in which the former is realized by the shared metallic via between two resonators. Comparisons show that the via-coupling provides more design flexibility, owns better tolerance to fabrication errors and requires more ordinary substrate than the traditional gap-coupling. These merits have been...
An improved compact substrate integrated waveguide (SIW) bandpass filter based on quarter-mode substrate integrated waveguide (QMSIW) is proposed in this paper. QMSIW bandpass filter has good performance and many advantages such as compact size, low insertion loss and easy integration, but narrow upper-stopband and bad rejection skirt still need to be improved. Source-loaded coupling structure can...
This paper proposed a quasi-elliptic bandpass filter on substrate integrated waveguide (SIW) cavity with cross-coupling structure using microstrip line. Etched slots on the SIW cavity are used to produce electric coupling between two adjacent SIW resonators, the cross-coupling is obtained by a microstrip-line with embedded stubs above the SIW cavity. By using cross-coupling and embedded stubs, a SIW...
In this paper an RF microelectromechanical (MEMS) tunable bandpass filter is designed for 3–4.2 GHz and the effect of substrate parameters was analyzed. The bandpass filter is achieved by adjusting the coupling parameters of microstrip resonator. The microstrip resonator is designed by coupling more than one microstrip lines resulting in the independent tuning of center frequency, bandwidth and quality...
This paper presents a novel design of 4 GHz substrate integrated waveguide (SIW)radiating bandpass filter using multilayer technique on the Printed Circuit Board.The circular cavity structure using TM010 mode for both filter and rectangular antenna areemployed in the design of this radiating bandpass filter. To realize the technique, modes of SIW filter and microstrip antenna are coupled using rectangular...
Along with high performance and miniaturization of electronic components, there is a tremendous demand for package substrate with thinner and higher density Coreless substrate could meet the requirement, which eliminates the core part in the substrate and utilizes only its build up materials to interconnect between the chip and PCB board. The major challenge for coreless substrate manufacturing and...
In this paper, we investigate the cause of the second harmonic of the parasitic pass-band of coupled-serial-shunted lines band-pass filters. Filters are employed substrate suspension, wavy-edge coupling, ring resonators, and a combination of the wavy-edge coupling and ring resonators to suppress the harmonic pass-band. Using a continuous perturbation of the wavy-edge and ring resonators of the harmonic...
This paper presents two types of wideband filters that have been developed at 5 and 28-GHz frequency bands, respectively. These filters have been fabricated with low temperature co-fired ceramics (LTCC) multilayer technologies. Each filter has approximately 20% and 12% 3dB bandwidth, insertion loss less than 1.5 dB, and has an attenuation over 30 dB at fit plusmn15% respectively. Design procedure...
In this paper, the design of a compact planar bandpass filter above a defected ground plane is presented. The filter is designed as a combination of microstrip resonators and exploits the properties of a planar electromagnetic bandgap (EBG) structure patterned unto the ground plane of the printed circuit board material to provide a very wide stopband of up to 5 times the fundamental frequency. The...
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