Design of waveguide-fed series slot arrays
Abstract
A design procedure is presented whereby the length and tilt of every slot in a series array can be determined, in the presence of external mutual coupling, in order to provide a specified pattern and input impedance. The slots are cut in a broadwall of rectangular waveguides, centred but inclined, and resonantly spaced to form linear or planar arrays. The design procedure parallels earlier treatment of the longitudinal shunt slot case, and combines Stevenson's method with a modified form of Booker's relation to treat nonresonant series slots. Two coupled design equations result, one linking slot voltage and mode current, the other linking active slot impedance to the active impedance in an equivalent dipole array. Simultaneous solution of these design equations is illustrated for the cases of a two by four array, a three by five array, and a five by five array. Experimental results for the two by four array are presented, and validate the theory satisfactorily.
- Publication:
-
IEE Proceedings H: Microwaves Optics and Antennas
- Pub Date:
- August 1982
- Bibcode:
- 1982IPMOA.129..165O
- Keywords:
-
- Antenna Arrays;
- Antenna Design;
- Antenna Feeds;
- Slot Antennas;
- Waveguide Antennas;
- Antenna Couplers;
- Antenna Radiation Patterns;
- Rectangular Waveguides;
- Electronics and Electrical Engineering