High-gain and large-aperture antennas with fixed beams are required to achieve high S/N ratio for point-to-point high-speed data-communication systems in the millimeter-wave band. Furthermore, beam-scanning antennas are attractive to cover wide angle with high gain for applications of high-speed data-communication systems and high-resolution sensing systems. High-gain pencil-beam antennas are u...

A cascade of resistively loaded etched rings in waveguide is proposed to act as the load in a balanced FMCW Reflected Power Canceller topology using a slotted waveguide array antenna. A synthesis technique using derived equivalent circuit models, is presented and tested.

A post-wall waveguide-fed parallel plate slot array shown in Fig.1 is one of the attractive candidates for high efficiency and mass producible planar array antennas in millimeter-wave applications [1]-[3]. A unit T-junction model with simplified PEC solid-walls was utilized for highspeed design using the method of moments [1]. Unfortunately, the antenna designed by this model was suffered from ...

This paper introduces a novel structure of 4×4 multiple beam forming antenna system using substrate integrated folded waveguide technology. For high speed wireless communication it is necessary to minimize the interferences and multipath fading. Multiple beam forming antenna system is a good solution to these problems. The substrate integrated folded waveguide (SIFW) technology reduces the widt...

This paper reviews not only the characteristic of the linearly-polarized plate-laminated waveguide slot array antenna in the 60GHz band but also conversion to circular or tilted linear polarization by adding a layer of apertures over the antenna. The linearly-polarized antenna achieves about 80% antenna efficiency and more than 32 dBi of gain is achieved over 4.8GHz bandwidth. The measured cros...

This paper presents design of an alternating-phase fed single-layer slotted waveguide array for a sector shaped beam in the Eplane radiation pattern. A sector beam pattern is very effective for radar applications for detecting obstacles in a certain angular range without mechanical or electronic scanning. The sector shaped beam with 13 degree beam width is synthesized by a cascade of T-junction...

Authors have developed various types of single-layer slotted waveguide arrays with simple structure and high mass-productivity. Those arrays have been successfully applied to relatively narrowband commercial services for satellite broadcast reception in 12 GHz band and wireless IP access at home in 26 GHz band etc. However, one weak point of that antenna is that the bandwidth of the antenna gai...

In this work we present the design and fabrication in metallic 3D-printing of a compact conformal slotted waveguide antenna array operating Ku-band. The application objective, although not limited only to this, is optimisation an element which by stacking will be able form quasi-cylindrical sector. A beamforming network used for beam-steering elevation plane as coverage azimuthal guaranteed geo...

A wideband dual-polarized slot array antenna based on hollow waveguide (HW) is presented in this article. Its wide bandwidth and high performance are enabled by two separate feeding networks, from the side bottom, using square coaxial line ridge structures, respectively. The full-corporate-feed networks excite radiation slots a one-to-one fashion without backed cavities. Tight element spacing m...