Slot radiator with tuning vias for circularly polarized SIW linear array

Abstract

In this paper, a 16-element circularly polarized (CP) Substrate Integrated Waveguide (SIW) linear array antenna with -26 dB Taylor distribution and 2% residue power at 17 GHz is designed. The single element consists of four crossed inclined radiating slots. In this configuration, reflection goals on the linear array are not fully achieved. For this reason a tuning element is included on some of the individual radiating elements, which consists of a pair of metallic vias that greatly enhances the reflection of longest slots. Therefore, the antenna reflection is also improved. A global antenna prototype is manufacture to check the new slot element performance in an array configuration. The specified operation band is 16.3 to 17.7 GHz.

Siw 2d Planar Array With Four Cross Slots Radiator and Tuning Vias

“…The single radiating element, shown in Figure 1, is formed by four crossed slots [10]. Two 45 • inclined and orthogonal radiating slots can be used to obtain circular polarization [2].…”

“…All parameters shown in Figure 1 have been optimized to good slot performance in terms of reflection and axial ratio response using CST Microwave Studio [10].…”

“…In [10] a 16 element progressive wave RHCP linear array antenna with −26 dB Taylor distribution and a 2% residual power (dissipated in a coaxial load at the end of the array) was presented. In this paper, a corporative SIW network is included to feed the 2D planar array, which is compound by 8 progressive wave linear arrays as the one shown in [10].…”

“…In this paper, a corporative SIW network is included to feed the 2D planar array, which is compound by 8 progressive wave linear arrays as the one shown in [10]. Nevertheless, as a difference, in this occasion all the input power is fully radiated.…”

“…Some examples of Ku-band operating systems are the new DBS band for broadcasting downlink (17.3-17.7 GHz), or satellite telemetry and tele-command subsystems (16.6-17.1 GHz). A mixed corporative (azimuth plane) and progressive (elevation plane) feeding network is included, and the slotted radiator behavior presented by authors in [10] is validated in a 2D array structure. Section 2 presents the antenna design process including the principles of the single element, the mutual coupling model and the SIW power divider.…”