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This paper describes a wide-band dual-polarized slotted-waveguide antenna working at V-band (57–66 GHz) based on Gap Waveguide concept. The antenna has three layers. The first one (feeding-layer 1) is practically identical to the second one (feeding-layer 2). This optimizes the design and facilitates manufacturing. The corporate-feeding networks on the two layers are rotated 90 degrees to each other...
This paper describes a low-loss ridge gap waveguide (RGW) to groove gap waveguide (GGW) transition. Transitions from RGW to GGW and viceversa can be advantageously combined leading to very compact feeding networks. Interestingly, these transitions circumvent the 180 deg phase difference in E-plane power splitters, facilitating in-phase corporate feeding networks based on such dividers. Using these...
A compact feeding structure for slot arrays is proposed in the context of so-called ridge gap waveguides. Slots are fed through a corporate feed network in ridge gap waveguide technology and backed by coaxial cavities. Coaxial cavities are very easy to integrate within the bed of nails hosting the ridge and lead to very compact 2 χ 2 basic radiating cell.
In this paper the benefits of using Groove Gap Waveguides (GGW) in the design of multilayer slotted-waveguide array antennas are presented. Groove Gap Waveguide do not need electrical contact between metal parts to confine the field, which facilitates the manufacturing process. This characteristic of the GGW becomes specially important for the millimeter-wave band, where antennas are becoming smaller...
This paper describes a new way to excite untilted slots in the narrow wall of a rectangular waveguide. The mechanism basically relies on an inclined parasitic dipole located within the waveguide, close to the slot and parallel to waveguide's narrow wall. The proposal is completed with a discussion of the convenience of using a groove gap waveguide in connection with this radiating element to significantly...
This communication describes a procedure for obtaining the equivalent-admittance representation of a slot in a waveguide. The approach is general, but it is particularly interesting for periodic waveguides, because it does not require knowing the Green's function of the wave guides or properly defining the ports in such waveguides. The procedure is demonstrated on a well-known rectangular waveguide...
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