Bi‐directional SIW leaky‐wave antenna using TE 20 mode for frequency beam scanning

In this article, a compact dual layer leaky wave antenna array is simulated and constructed using the substrate integrated waveguide (SIW) based on the TE20 mode at the X‐ and Ku‐bands. The proposed antenna is designed by creating dumbbell‐shaped slots on the upper layer of the SIW. These slots have increased the antenna bandwidth so that the proposed antenna has a bandwidth of 9.5 to 13.7 GHz and a fractional bandwidth of 36%. In addition, to excite the TE20 mode, an SIW power divider is used in the feeding network of the antenna located in the bottom layer. Moreover, the gain and directivity are other advantages of the proposed antenna so that at 12.5 GHz the antenna peak gain reaches to 15.7 dB. Antenna beam scanning angle is from 5° to 81°. This antenna is simulated and analyzed by the CST Microwave Studio software. The obtained results from the antenna test lab confirm the simulation results.

Section: Introductionmentioning

confidence: 99%

“…Also, the TE 20 mode for designing antenna arrays is a useful approach. 18,19 Recently, various techniques have been used to excite the higher modes. [20][21][22] In this article, the TE 20 mode is excited using an SIW power divider (3-dB power divider with 180 phase difference).…”

Section: Introductionmentioning

confidence: 99%

Compact bilayer substrate integrated waveguide leaky wave antenna with dumbbell‐shaped slot based on the TE ₂₀ mode

Abolfathi

Rezaei

Sharifi

2019

“…, a wider scanning has been achieved by utilizing CRLH TLs. More recently, the higher order TE 20 mode of SIW has also been utilized to design high gain and compact LWA …”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3] The utilization of higher order mode of SIW in designing antenna array makes the design compact and also reduces the fabrication cost. 4,5 Besides this, the rapid growth in wireless communications and other surveillance applications demand a new standard having maximum beam-scanning coverage area, compactness, fair gain and so forth. These systems often demand simultaneous multiple beams and beam steering capabilities.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

TE ₂₀ mode substrate integrated waveguide based high gain eight‐beam leaky‐wave antenna for multi‐directional radiation coverage

Sarkar

Sharma

Biswas

et al. 2018

In this article, a TE20 mode substrate integrated waveguide (SIW) is utilized to design a leaky‐wave antenna (LWA) which is capable to scan all the four directions (eight quadrants) simultaneously. With the eight radiated main beams, frequency beam scanning range of the proposed antenna is 56° in all the eight quadrants. By exploiting co‐axial probe feeding and step impedance transformer, four ways microstrip power divider is designed which is further exploited to feed all the four TE20 mode SIW sections containing microstrip‐coupled slotline‐SIW transitions. For radiation, ±45° rectangular slots are systematically placed on the top as well as bottom plane of the structure. The proposed antenna is working within the frequency range of 10‐11.7 GHz having the maximum peak gain of 14 dBi. The proposed design is verified by experimental results which are in good agreement with the simulation. Along with the utilization of higher order mode of SIW to achieve compactness and design simplicity, the four directional frequency beam scanning capability makes it a promising candidate in various microwave circuits and several beam‐scanning applications including navigational and surveillance purpose.

S‐shaped planar antenna with 45° tilted bidirectional radiation pattern for motorcycle helmets

Kim

et al. 2020

An S-shaped planar antenna (SPA) with a bidirectional radiation pattern and beam tilt characteristic is proposed to achieve maximum communication distance for helmet applications. The proposed SPA is comprised of an S-shaped radiation strip (consisting of a microstrip meander line and two main arms with two inverted L-shaped parasitic elements) and a rectangular ground plane, where a simplified microstrip power divider is introduced by modifying the feed structure in the center of the SPA, such that the S-shaped radiation strip works in the second resonant mode. The proposed SPA generates a tilted beam in the E-plane with an angle of 45 , which is attributed to the obliquely staggered arms of the antenna at a distance. By introducing inverted L-shaped parasitic elements at the end of the two arms, the directivity of the bidirectional radiation pattern can be further improved, thereby increasing the antenna gain. The working principle is analyzed theoretically, and the effects of the antenna structural parameters on the radiation pattern are also analyzed. The experimental results indicate that the 3:1 VSWR impedance bandwidth is 120 MHz, with a realized peak gain of 1.5 dBi at 2.45 GHz. The proposed antenna is designed for real-world applications, allowing the antenna to be obliquely installed while keeping the peak gain direction horizontal for maximum communication distance.