Abstract: A microstrip tee-fed slot antenna is made up of only a single printed circuit board having the tee feed and slot on the front side and a microstrip transmission line feed on the back side. A plurality of holes in the board surrounding the slot are electrically connected front to back to provide the antenna cavity. Since only a single board is used having all of the components of the antenna on either side, no disassembly is required to add to or modify the elements of the antenna.

Abstract: The transition between a rectangular waveguide and a stripline is accomplished with an assembly which contains: a waveguide flange, a waveguide section, and a tapered wedge. The waveguide flange physically connects with the rectangular waveguide and the waveguide section. The waveguide section has the tapered wedge housed within it along its top, and is electrically connected to the ground planes of the stripline. The tapered wedge is electrically connected with the center conductor of the stripline, to provide a transition between the rectangular waveguide and the stripline. Optimum impedance matching and voltage standing wave ratio can be empirically determined in the assembly by inputting signals into the stripline or waveguide, and taking impedance measurements while moving a reflecting panel which rests behind the tapered wedge to different positions in the slotted waveguide section.

Abstract: A waveguide-to-stripline transition includes a stripline portion (14) that fits over an opening in one end of waveguide (12). The stripline portion has a cavity defined by an upper ground-plane conductor (20), a lower ground-plane conductor (22), and a rectangular arrangement of plated-through holes (28) that electrically connect the upper ground-plane conductor (20) to the lower ground-plane conductor (22). The upper ground-plane conductor (20) is etched to provide an aperture (32) with a conductive crosspiece (34) extending longitudinally across it. A plated-through hole (36) connects the crosspiece (34) to the center conductor (26) to provide a T-shaped feed element in the cavity. As compared with prior-art waveguide-to-stripline transitions, this transition is mechanically stronger and has higher power-handling capability.