Miniaturized SIW Cavity Resonator and Its Application in Filter Design

Jia

Micro & Optical Tech Letters

et al. 2019

In this study, a compact filtering 2 × 2 array antenna with high selectivity utilizing substrate integrated waveguide (SIW) is presented. The proposed antenna structure is mainly composed of coplanar waveguide feeding structures, SIW filtering cavities, and four radiation patches by low‐temperature co‐fired ceramic technology. The designed antenna not only achieves the advantages of high selectivity but also realizes a miniaturized volume of 12 × 12 × 1.18 mm3. The simulated and measured results show that the filtering antenna achieves a center frequency of 28 GHz and has a 10.7% fractional bandwidth with a 10.8 dB antenna gain.

Section: Introductionmentioning

confidence: 99%

“…Using the SIW technology, different excellent contributions have been explored for filters and antennas. [1][2][3] In traditional design methods, filter and antenna, as two microwave devices with different functions, are usually designed separately. They can be cascaded with corresponding connecting wires to work together.…”

Section: Introductionmentioning

confidence: 99%

Compact low‐temperature co‐fired ceramic filtering antenna array with high selectivity exploiting substrate integrated waveguide for 5G

Jia

Micro & Optical Tech Letters

et al. 2019

Micro & Optical Tech Letters

“…In the work of Ho et al, the proposed SIWC possesses a complexity between those of Refrences . Instead of being embedded in the top SIWC wall as in Reference , the circular patch in Reference is placed in a sandwiched middle metal layer so that the resulting loading capacitance between the circular patch and the top/bottom SIWC walls is much larger than the one in Reference . As a result, the size reduction rate of the new evanescent‐mode SIWC (or termed coaxial resonator) is enhanced to more than 96% .…”

Section: Introductionmentioning

confidence: 99%

“…Instead of being embedded in the top SIWC wall as in Reference , the circular patch in Reference is placed in a sandwiched middle metal layer so that the resulting loading capacitance between the circular patch and the top/bottom SIWC walls is much larger than the one in Reference . As a result, the size reduction rate of the new evanescent‐mode SIWC (or termed coaxial resonator) is enhanced to more than 96% . Although slightly less compact than the circular SIWC in Reference the one in Reference is much easier to fabricate because only two substrate layers and three metal layers are required and no buried via holes are needed.…”

Section: Introductionmentioning

confidence: 99%

“…As a result, the size reduction rate of the new evanescent‐mode SIWC (or termed coaxial resonator) is enhanced to more than 96% . Although slightly less compact than the circular SIWC in Reference the one in Reference is much easier to fabricate because only two substrate layers and three metal layers are required and no buried via holes are needed. With the intension of constructing a circuit that is not too complicated, the structure proposed in Reference is hence adopted here to design an ultra‐miniature SIWC trisection BPF.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultra‐miniaturization design of substrate‐integrated waveguide cavity trisection bandpass filter

Mimsyad

Hsu

2019

Self Cite

The contribution of this work is to propose a novel trisection bandpass filter (BPF) using only one ultraminiature substrate-integrated waveguide (SIW) cavity. The SIW cavity is composed of two substrate layers and a very thin prepreg layer for binding purpose. A circular patch is deployed on the cavity's middle metal layer and is evenly trisected into three identical pieces. Each piece is shorted to the cavity's bottom face by a blind via. The cavity together with the via-shorted trisected patches form the trisection filter's resonators. This trisectedpatch-loaded SIW cavity has the dominant-mode resonance frequency much lower than that of the standard patch-free SIW cavity. The down shift in the resonance frequency of the proposed resonator structure has effectively led to a significant circuit-size reduction. When compared with a three-pole BPF consisting of three standard patch-free SIW cavities, the size reduction rate of our proposed BPF requiring only one SIW cavity is as high as 97.47%, which might be the highest record achieved so far. An experiment has been conducted to verify the proposed circuit design. Besides ultra-circuit miniaturization, the measured upper stopband with the rejection of larger than 20 dB is as wide as 2.38 times the passband center frequency. K E Y W O R D S circuit miniaturization, trisection BPF, substrate-integrated waveguide

Miniaturized substrate integrated waveguide 5G LTCC bandpass filter exploiting capacitive loaded cavities

Jia

Int J RF Microw Comput Aided Eng

et al. 2019

In this article, a compact bandpass filter with a pair of transmission zeros exploiting capacitive loaded cavities is presented. The proposed filter structure is mainly composed of coplanar waveguide (CPW) feeding structures and four substrate integrated waveguide (SIW) resonators. The size of the filter has been greatly reduced due to the capacitive loaded circle metallic septum and the vertical coupling of stacked cavities in three dimensional structures by low temperature co-fired ceramic technology. The filter not only achieves the advantages of high-selectivity, a much wider upper stopband bandwidth, but also realizes a miniaturized volume of 3.35 × 2.10 × 0.66 mm 3 . The simulated and measured results show the bandpass filter achieves a center frequency of 28 GHz with 3 dB fractional bandwidth of 8%. The filter is suitable for application in 5G wireless communication.capacitive loaded, high-selectivity, LTCC, metallic septums, SIW, upper stopband