Design and performance of log-periodic substrate integrated waveguide slot antennas

Review of Substrate Integrated Waveguide Circuits for Beam-Forming Networks Working in X-Band

“…There are some methods to achieve this, for example, by using slot arrays [49] or by using cavity-backed patches [50][51][52][53]. In most cases, the performances obtained by SIW antennas are lower compared to their rectangular waveguide counterparts [54][55][56][57][58]. However, substrate integrated waveguides are gaining a lot of attention for their fabrication of low profile and low-cost antennas for 5G applications [59,60], where standard waveguides are not practical.…”

Recent advances in theory and applications of substrate-integrated waveguides: A review

“…Using the concept of hollow SIW, a slotted waveguide antenna array was designed in . Using classical log‐periodic theory, SIW slot antennas with broadband performance were presented in . Based on the orientation of the slots a transverse SIW slot antenna and a longitudinal SIW slot antenna were designed and results indicated a much wider impedance bandwidth as compared to traditional slotted waveguide antennas.…”

“…Moreover, there is no need of transition between elements fabricated with different technologies, thus reducing the losses and extending the concept of system‐in‐package to system‐on‐substrate (SoS) . Over the last decade SIWs have been used in design of many microwave components including post and cavity filters , power dividers , phase shifters , attenuators , oscillators , various antennas (slot, array and conformal) , and reconfigurable microwave resonators, antennas and filters . Figure shows the number of publications using SIWs over the past decade showing the cumulative annual growth.…”

Broadband Single-Layer Slotted Array Antenna in SIW Technology

“…With the above premises, the present design of a SIW planar antenna [2,3] with high gain, squint-less main lobe, and very wide bandwidth (10.7-12.7 GHz), for Direct Broadcast Satellite (DBS) and radar applications, is particularly challenging. In comparison with standard slotted rectangular waveguide (RWG) antenna-arrays [4], or with common satellite dishes, the achievable gain and efficiency are expected to be significantly lower, due to fabrication tolerances and dielectric losses (if inexpensive materials are to be employed) [5][6][7][8][9][10]. In the literature, many other planar solutions, mostly employing microstrips and patches, have been considered [11][12][13][14][15].…”