Design of Substrate Integrated Coaxial Line (SICL) fed dipole antenna for K band application

A Substrate Integrated Coaxial Line Dual-Band Balun for 5G Applications

Abstract: This paper demonstrates the design of a dual-band substrate integrated coaxial line (SICL) balun operating at 6 GHz and 28 GHz for 5G application. The proposed design is realized using open-ended coaxial stubs with shielding. The performance of the dual-band SICL configuration is analyzed and range of realizable frequency ratios is determined from the analytically derived equations. The designed SICL based balun demonstrates low amplitude and phase imbalance in both the desired bands with good inter-band suppression making it worthy for practical applications. A fractional bandwidth of 17.6% and 3.97% at 6 GHz and 28 GHz band respectively is achieved by the proposed balun covering $0.43\lambda_{g}\times 0.68\lambda_{9}$ circuit area. The electromagnetic robustness and wide-band single mode TEM characteristics of the proposed SICL based dual-band balun makes it a befitting option to deploy in millimeter-wave range.

Planar dipole antenna with low inhibition characteristic

Abstract: The invention relates to a planar dipole antenna with a low inhibition characteristic, and mainly aims at improving the anti-interference and electromagnetic compatibility performances of a radar. Theantenna comprises a planar radiation unit, a band shaped line and SIW conversion unit and a double-layer common-ground substrate integrated waveguide. The planar radiation unit uses a dipole antennabased on a band shaped line form; the double-layer common-ground substrate integrated waveguide is composed of two substrate integrated waveguide layers which share the intermediate metal ground; anda central conductor of the planar radiation unit is connected to the intermediate metal ground via the band shaped line and SIW conversion unit and the double-layer common-ground substrate integratedwaveguide, impedance match between the band shape and the substrate integrated waveguide is realized, and the planar radiation unit includes the low inhibition characteristic of the substrate integrated waveguide. The planar dipole antenna with the low inhibition characteristic is designed via the band shaped line form, low-loss conversion integration between the band shaped line and the substrateintegrated waveguide is realized successfully, and a basis is provided for improving the low-frequency filtering characteristic of the radar in the front end.

Design of Folded Substrate Integrated Coaxial Line Wideband Balun for K-band Applications

Abstract: The design of Substrate Integrated Coaxial Line (SICL) based wideband baluns for K-band application are presented in this work. The proposed two-section branch-line balun realized in SICL technology can be fabricated using traditional PCB technology. The performance of the planar and folded balun are evaluated to demonstrate low amplitude and phase imbalance in the entire K-band covering 18 GHz to 26 GHz. Fractional bandwidth of 40.68% and 37.27% are achieved by the proposed planar and folded balun, respectively. The size of planar SICL balun is $0.73\lambda_{g}\times 0.78\lambda_{g}\times 0.05\lambda_{g}$ , and the folded balun covers only 58% lateral area as compared to the planar balun. The wide-band single mode TEM characteristics of these baluns realized in SICL technology have enhanced shielding capability which motivates their usage in densely integrated millimeter-wave systems.

Design of Substrate Integrated Coaxial Line based Broadband Dipole Antenna for Millimeter Wave Application

Abstract: A broadband dipole antenna fed by the Substrate Integrated Coaxial Line (SICL) to work in Local Multipoint Distributed System (LMDS) band is presented in this paper. The feeding network consist of SICL which holds the advantage of eliminating the complex network of balun and reflector in conventional microstrip based feeding designs of planar antennas. The proposed design utilises parasitic dipole in addition to the primary dipole antenna to enhance bandwidth. This antenna exhibits gain varying from 7.2dBi to 8dBi and 19% impedance bandwidth within the range of 25.7GHz to 31.2GHz. This antenna finds its application in LMDS (26GHz-29GHz) systems and millimetre wave applications.

Planar Transitions from Substrate Integrated Coaxial Line to Single-Layer Transmission Lines and Waveguides

Abstract: This paper presents inline transitions from substrate integrated coaxial line (SICL) to microstrip line, coplanar waveguide (CPW), as well as substrate integrated waveguide (SIW). A common property is the conversion of transmission medium from double to single substrate layer of PCB. The first two of described transitions can be used from DC up to the presence of higher order modes if the characteristic impedances of two meeting transmission lines are matched. The transition to substrate integrated waveguide is of higher complexity, yet compact. Both sides of the SICL-SIW transition are strongly coupled to resonant cavity, and return loss greater than 20 dB is achieved in fractional bandwidth of 10.91 %. Improvements compared to the existing solutions have been made in designs of all three transitions.

60 GHz wireless communications: emerging requirements and design recommendations

Abstract: Multiple GHz of internationally available, unlicensed spectrum surrounding the 60 GHz carrier frequency has the ability to accommodate high-throughput wireless communications. While the size and availability of this free spectrum make it very attractive for wireless applications, 60 GHz implementations must overcome many challenges. For example, the high attenuation and directional nature of the 60 GHz wireless channel as well as limited gain amplifiers and excessive phase noise in 60 GHz transceivers are explicit implementation difficulties. The challenges associated with this channel motivate commercial deployment of short-range wireless local area networks, wireless personal area networks, and vehicular networks. In this paper we detail design tradeoffs for algorithms in the 60 GHz physical layer including modulation, equalization, and space-time processing. The discussion is enhanced by considering the limitations in circuit design, characteristics of the effective wireless channel (including antennas), and performance requirements to support current and next generation 60 GHz wireless communication applications.

A broadband planar quasi-Yagi antenna

Abstract: A novel broadband planar antenna based on the classic Yagi-Uda dipole array is presented. This "quasi-Yagi" antenna achieves a measured 48% bandwidth for VSWR <2, better than 12 dB front-to-back ratio, smaller than -15 dB cross polarization, 3-5 dB absolute gain and a nominal efficiency of 93% across the operating bandwidth. Finite-difference time-domain simulation is used for optimization of the antenna and the results agree very well with measurements. Additionally, a gain-enhanced design is presented, where higher gain has been achieved at the cost of reduced bandwidth. These quasi-Yagi antennas are realized on a high dielectric constant substrate and are completely compatible with microstrip circuitry and solid-state devices. The excellent radiation properties of this antenna make it ideal as either a stand-alone antenna with a broad pattern or as an array element. The antenna should find wide applications in wireless communication systems, power combining, phased arrays and active arrays, as well as millimeter-wave imaging arrays.

New Automotive Sensors—A Review

Abstract: This paper focuses on the primary automotive sensor technologies used today and their related system applications. This paper describes new automotive sensors that measure position, pressure, torque, exhaust temperature, angular rate, engine oil quality, flexible fuel composition, long-range distance, short-range distance, and ambient gas concentrations. In addition, new features are described for sensors that measure linear acceleration, exhaust oxygen, comfort/convenience factors, and night vision. New automotive system applications are described for sensors that measure speed/timing, mass air flow, and occupant safety/security.

A Novel Substrate Integrated Coaxial Line (SICL) for Wide-Band Applications

Abstract: A novel substrate integrated coaxial line (SICL) is presented and experimentally verified in this paper This structure exhibits unimodal operation over a wide frequency band, is shielded and not dispersive, can be fabricated by using simple, low-cost thin?film process, and can be easily integrated with active devices Moreover, the same technology results particularly suitable to realize passive components for wideband applications The design of a Lange coupler with operation bandwidth of 66%, to be used in a Multi-port Impulse Radio for Ultra Wide Band applications, is reported

Integrated waveguide slot antennas

Abstract: Waveguide slot antennas integrated on microwave laminate are presented, and single and dual slot antennas are described, which operate at 10 GHz.