Substrate-integrated waveguide (SIW) technology represents an emerging and very promising candidate for the development of circuits and components operating in the microwave and millimetre-wave region. SIW structures are generally fabricated by using two rows of conducting cylinders or slots embedded in a dielectric substrate that connects two parallel metal plates, and permit the implementation of classical rectangular waveguide components in planar form, along with printed circuitry, active devices and antennas. This study aims to provide an overview of the recent advances in the modelling, design and technological implementation of SIW structures and components.

Review of substrate-integrated waveguide circuits and antennas

A novel design method of low profile cavity backed planar slot antenna has been described in this paper. The whole antenna including backed cavity and feeding element is completely constructed at a single substrate by using substrate integrated waveguide technique and grounded coplanar waveguide. An example with 1.7% bandwidth has been presented, which has 5.4 dBi gain, 16.1 dB front-to-back ratio and -19 dB maximum cross polarized radiation level with its total thickness less than lambda0/50. The proposed antenna keeps good radiation performance of conventional cavity backed antenna and has advantages of conventional planar antenna including low profile, light weight, easy fabrication with low cost and convenient integration with planar circuit.

Planar Slot Antenna Backed by Substrate Integrated Waveguide Cavity

© 2018 ФГБОУ ВО МГППУ «Московский государственный психолого-педагогический университет» © 2018 Moscow State University of Psychology & Education E-journal «Journal of Modern Foreign Psychology» 2018, vol. 7, no. 2, pp. 90—99. doi: 10.17759/jmfp.2018070209 ISSN: 2304-4977 (online) Электронный журнал «Современная зарубежная психология» 2018. Том 7. No 2. С. 90—99. doi: 10.17759/jmfp.2018070209 ISSN: 2304-4977 (online)

Анализ конструктивно-технологических ограничений при проектировании лавинных фотодиодов, работающих в режиме счета фотонов

Single fed low profile cavity backed crossed slot antennas for dual frequency dual linear polarization and circular polarization applications are first presented in this paper. By employing the substrate integrated waveguide (SIW) technique in the antenna designs, the low profile backed cavity structure can be realized by using only a single layer of low cost printed circuit board (PCB) substrate. A single grounded coplanar waveguide (GCPW) is employed as the feeding element to excite the TE 120 and TE 210 modes in the SIW cavity. A crossed slot structure is used as the radiating element in order to radiate the desired dual linearly or circularly polarized wave. From the measurement results, it is seen that these novel antennas retain the advantages of conventional metallic cavity backed antennas, including high gain, high front-to-back ratio (FTBR), and low cross polarization level (CPL). Furthermore, the proposed antennas also possess the advantages of low profile, light weight, low fabrication cost, and easy integration with planar circuits.

Development of Low Profile Cavity Backed Crossed Slot Antennas for Planar Integration

A bandwidth enhanced method of a low-profile substrate integrated waveguide (SIW) cavity-backed slot antenna is presented in this paper. Bandwidth enhancement is achieved by simultaneously exciting two hybrid modes in the SIW-backed cavity and merging them within the required frequency range. These two hybrid modes, whose dominant fields are located in different half parts of the SIW cavity, are two different combinations of the and resonances. This design method has been validated by experiments. Compared with those of a previously presented SIW cavity-backed slot antenna, fractional impedance bandwidth of the proposed antenna is enhanced from 1.4% to 6.3%, its gain and radiation efficiency are also slightly improved to 6.0 dBi and 90%, and its SIW cavity size is reduced about 30%. The proposed antenna exhibits low cross polarization level and high front to back ratio. It still retains advantages of low-profile, low fabrication cost, and easy integration with planar circuits.

Bandwidth-Enhanced Low-Profile Cavity-Backed Slot Antenna by Using Hybrid SIW Cavity Modes

A compact frequency-selective surface (FSS) having a quasi-elliptic bandpass response is presented in this paper. This was realized by vertically cascading substrate integrated waveguide (SIW) cavities. A single SIW cavity FSS has been fully studied and approximate analytical formulas are introduced to calculate its resonant frequencies. Two different resonances can be excited by a plane wave in the single SIW cavity FSS. According to theories of the cascading cavity filter and dual-mode filter, cross coupling can be realized in cascading SIW cavity FSSs, thus a compact FSS with a quasi-elliptic bandpass response is implemented. A Ka-band sample was fabricated by a printed circuit board (PCB) process. Experiments were carried out to validate this design method. Measured results are in agreement with predicted ones. The proposed quasi-elliptic FSS presents a number of advantages, namely, high selectivity, stable performance, and much reduced volume.

Design and Experimental Verification of Compact Frequency-Selective Surface With Quasi-Elliptic Bandpass Response

A novel triband frequency selective surface (FSS) constructed by square loop slots etched on substrate integrated waveguide cavities (SLS-SIWC) is investigated, in which each periodic cell consists of two neighboring SLS-SIWCs with different dimensions Good selectivity performance of each passband can be easily achieved by tuning the dimensions of the SLS-SIWCs Besides, the passbands are mainly determined by the corresponding SLS-SIWC in the neighboring perturbed cells and can be designed independently The performance is verified by measured results, which is insensitive to the variation of incident angles According to the explicit physical concept, some improved analytical formulas are adopted, which makes the design process straightforward and simple

Ling Ling Sun

Papers

Planar Slot Antenna Backed by Substrate Integrated Waveguide Cavity

Development of Low Profile Cavity Backed Crossed Slot Antennas for Planar Integration

Bandwidth-Enhanced Low-Profile Cavity-Backed Slot Antenna by Using Hybrid SIW Cavity Modes

Design and Experimental Verification of Compact Frequency-Selective Surface With Quasi-Elliptic Bandpass Response

Triband Frequency Selective Surface With Periodic Cell Perturbation