Experimental Research on VSWR of a Rectangular Waveguide with a Longitudinal Slot with a Change in its Dimentions and Excitation Pin Length

Wave-slot antennas are widely used in on-board radio systems. The requirements for such to reduce weight and size indicators power losses the antenna feed system. To fulfill these requirements, it is possible, particular, use a rectangular waveguide with longitudinal slot (if convenient cut along surface current lines), as weakly directional radiator or an element of slotted array. In this case, reactive pin excite adjust it. For practical implementation antenna, important ensure appropriate matching excited by pin, both free space. Therefore, article, possibility reducing voltage standing wave ratio excitation was studied experimental method. Experimental data obtained on change dimensions (length, width), length position short-circuited copper plug which completes waveguide. cross-sectional 23 mm 10 mm, operating Н10 main type oscillations, graphs were specify dependence coefficient different lengths fixed values its width 1.98 cm 2.97 cm. optimal minimum (no more than 3) summarized table. With 0.7 cm, 1.3 1.5 does not exceed 1.4. results studies do contradict existing theories can be design waveguide, pin.