Exponentially Tapered Slot Research Articles

A Novel Ultrawideband Exponentially Tapered Slot Antenna of Combined Electric-Magnetic Type

A novel exponentially tapered slot antenna with ultrawide bandwidth and small late-time ring is presented. A microstrip-to-coplanar-stripline (CPS) transition of Chebyshev multisection type is used as feeding transmission. The exponentially tapered slot, which is considered as electric-type radiator (ER), is combined with a magnetic-type radiator (MR) to achieve ultrawideband performance and small size. The MR is completed by a lumped resistor bridged between the loop arm and the transmission ground. The measured impedance bandwidth (VSWR <; 2) of optimized antenna is 0.65 ~ 5.9 GHz, which agrees well with the simulated results. The measured gain is almost 3 dBi in the whole band, and the front-to-back ratio is about 15 dB.

Planar High Gain Dielectric Loaded Exponentially Tapered Slot Antenna for Millimeter Wave Wireless Communications

A new and upcoming application is the use of millimeter wave (MmW) antennas for high date rate point-to-point connections to serve gigabit (Gi-Fi) wireless communications. The concept of substrate integrated waveguide (SIW) and exponentially tapered slot (ETS) antenna are used together design a high gain, efficient planar dielectric loaded antenna for MmW Gi-Fi wireless communications at 60 GHz. The SIW is used to feed the antenna and a dielectric loading is utilized in front of the antenna to increase the gain. The dielectric loaded ETS antenna and compact SIW feed are fabricated on a single substrate, resulting in low cost and easy fabrication. The antenna with elliptical shaped dielectric loaded is fabricated using printed circuit board process. The measured gain of the antenna is 11.4 dB, while the radiation efficiency of 96.84 % is obtained at 60 GHz. The measurement results are compared with simulated results.

Indoor channel characterization studies for V-band gigabit wireless communications using dielectric-loaded exponentially tapered slot antenna

Demands for very high-speed wireless communication access is rapidly growing with respect to the increasing data rates for the use of rich multimedia content in various applications of defense, enterprise, industrial, and public domains. To serve these gigabit fidelity (Gi-Fi) uses for various wireless applications, millimeter wave (MmW) wireless technology with huge bandwidth in licensed/unlicensed bands is triggering boundless avenues. In this research, the concept of substrate-integrated waveguide (SIW) and exponentially tapered slot (ETS) antenna are used together design a high-gain, efficient planar dielectric-loaded antenna for MmW-based Gi-Fi wireless communications using unlicensed 60 GHz band in the MmW family. The SIW is used to feed the antenna and a dielectric is utilized increasing the gain. The dielectric-loaded ETS antenna and compact SIW feed are fabricated on a single substrate, resulting in low cost and easy fabrication utilizing printed circuit board process. The measured gain of single-element antenna is 11.4 dB, with radiation efficiency of 96.84% at 60 GHz. Then indoor radio wave propagation studies are carried out using elliptically dielectric-loaded ETS antenna with radio frequency measurement equipment to measure and model propagation channels at 60 GHz. The attained simulations are compared with the experimental results.

Indoor radio link characterization studies for millimeter wave wireless communications utilizing dielectric-loaded exponentially tapered slot antenna

A trend that is pragmatic in today’s wireless communications is the demand for the supportof increasing data rates over short distances. Through the last decade, ample knowledge about the 60 GHz millimeter wave (MmW) channel has been gathered and different architectures have been analyzed to develop MmW communication systems for commercial applications. The usage of MmW frequencies is perceived as a resilient entrant for realizing future, gigabit wireless communications as it offer vast bandwidths for short-range indoor communications. In this work, the MmW antenna solutions for exponentially tapered slot (ETS) antenna using substrate integrated waveguide (SIW) technology and indoor radio wave propagations are studied at 60 GHz for wireless communications. The SIW is used to feed the antenna, and a dielectric loading is utilized in front of the antenna to increase the gain. The antenna with elliptical-shaped dielectric loaded is fabricated using printed circuit board process. The measurement results are compared with simulated results. Then, the indoor short-range radio wave propagation study is carried out using ETS antenna with RF measurement equipment to measure and model propagation channels at 60 GHz. The attained simulations are compared to the experimental results.

Design of Widebeam Tapered Slot Antenna for Wideband Airborne Active Phased Array Radar

Background/Objectives: Vivaldi antenna is a prime candidate for wide band applications. This work involves a design of miniaturized tapered slot antenna operating with X-band frequency to achieve wide scan capability, wide beam, maximum gain and minimum return loss for active phased array antenna. Methods/Statistical Analysis: The design of Vivaldi Exponentially Tapered Slot Antenna (VETSA) and analysis of radiation patterns, return loss, beam width and scan angle are done through the use of electromagnetic simulation software HFSS. The analysis was carried out in 3D and 2D. Further, testing and measurement of fabricated Vivaldi antenna using Vector Network Analyzer and radiation patterns are observed in Anechoic Chamber. Design of linear array and planar array is also presented. Findings: VETSA satisfies the requirements on the maximum reflection coefficient < -10 dB for ±60o scan from broadside in E-and H-planes. The realized antenna showed a symmetric pattern, minimum return loss, better 3-dB beam width in principal planes with gain of 3-dB, and VSWR ≤ 2 in X-band frequency. The result of linear array with 9-elements demonstrates good radiation characteristics with gain of 13 dB with low SLL including coupling effects in the X-band operating frequency. The uniformly illuminated array beam pattern shows that the array can scan over the desired scan volume of ±60o in E-plane and ±55o in H-plane. VETSA is a promising candidate to operate in wideband frequency with wide scanning performance in airborne radar applications. Application/Improvements: The designed antenna structure and array are good candidates and is expected to find applications in integration with monolithic millimeter-wave integrated circuits on combat aircraft.

High gain dielectric loaded exponentially tapered slot antenna array based on substrate integrated waveguide for V-band wireless communications

The conception of substrate integrated waveguide (SIW) technology and exponentially tapered slot (ETS) antenna are together used to design a high gain, and efficient planar dielectric loaded antenna for V-band wireless communications. SIW is used to feed the proposed antenna. To increase the gain of the antenna, a dielectric loaded portion is used in front of the antenna and works as a dielectric guiding structure.The dielectric loaded ETS antenna and compact SIW feed are fabricated on a single substrate, resulting in low cost and easy fabrication. The antenna with elliptical shaped dielectric loaded is fabricated using printed circuit board process. The measured gain of the single element antenna is 10.2dB, while the radiation efficiency of 96.84% is obtained at 60GHz. The Y-junction SIW power divider is used to form a 1×2 array structure. Measured gain of the 1×2 array antenna is 11.2dB, while the measured radiation pattern and gain are almost constant within the wide bandwidth of the antenna.

DIELECTRIC LOADED EXPONENTIALLY TAPERED SLOT ANTENNA FOR WIRELESS COMMUNICATIONS AT 60 GHZ

This paper deals with the dielectric loaded Exponentially Tapered Slot (ETS) antenna needed for ultra-high-speed, high- capacity wireless communication systems which work at 60GHz and illustrates its speciflcations and requirements. The antenna in such system requires high gain, high-e-cient and high performance design speciflcations. The ETS antenna and the loaded dielectric are integrated using the same single substrate resulting in easy fabrication and low cost. The ETS antenna with rectangular and elliptical shaped loaded dielectrics were designed and fabricated. These antennas have high gain and wider beamwidth in both E-plane and H-plane. The proposed antenna design is simulated using 3D electromagnetic software CST Microwave Studio and the comparison is made with Ansys HFSS to validate the design procedure. The results obtained from the simulations and the measurements are in good agreement.

DIELECTRIC LOADED EXPONENTIALLY TAPERED SLOT ANTENNA UTILIZING SUBSTRATE INTEGRATED WAVEGUIDE TECHNOLOGY FOR MILLIMETER WAVE APPLICATIONS

A novel compact dielectric loaded Exponentially Tapered Slot (ETS) antenna using Substrate Integrated Waveguide (SIW) technology is presented in this paper for Millimeter (Mm) wave wireless communication applications. The dielectric loaded ETS antenna and compact SIW feed are fabricated on a single substrate. The compact SIW feeding structure results in a considerable reduction in size and eliminates the unwanted radiations from feed. The proposed antenna is designed, fabricated, and investigated at 60GHz. Furthermore, the proposed antenna design is simulated using electromagnetic software CST Microwave Studio and the comparison is made with Ansys HFSS to validate the design procedure. The measurement results are compared with simulated results.