Dish antenna with impedance matched splash plate feed

A microwave antenna system comprising:

• a. a concave reflective antenna member having a finite focus, said member being pivotable through a predetermined angle;
• b. means for supplying microwave energy to, and for receiving microwave energy from said reflector, said means being positionally fixed relative to said member and including a splash plate having a pair of oppositely directed wing portions inclined toward said member, and a wave guide of generally rectangular cross section having a first input/output end penetrating said member, and a second end at the focus point of said member, said second end being in connected abutment with said splash plate, said wave guide defining a pair of apertures on opposite surfaces thereof, opening said wave guide toward said wing portions substantially at said abutment, therby forming means for focusing energy between said wave guide and said member via said apertures;
• and
• c. first and second impedance matching means, each being substantially coplanar with a different one of said opposite surfaces and each partially occluding an associated one of said apertures, said impedance matching means promoting the VSWR of said antenna system throughout the pivot range of said member.