Open waveguide antenna and system having the same

An open waveguide signal feed system, comprising:

• a printed circuit board having a signal feed and a signal feed output;
• an open waveguide having a signal feed input port;
• a transition region disposed between and in signal communication with the signal feed output and the signal feed input port;
• wherein the signal feed comprises a microstrip, a coplanar waveguide, or a stripline;
• wherein the signal feed output comprises a patch or a probe.

An open waveguide antenna, comprising:

• a trough having first and second opposing sidewalls, a septum disposed therebetween, a first base disposed between the first sidewall and the septum, and a second base disposed between the septum and the second sidewall;
• wherein one or more of surfaces internal to the trough of at least the first sidewall, the second sidewall, the septum, the first base, and the second base, are electrically conductive;
• wherein the first base has a first sequence of undulations that are longitudinally disposed along a length of the trough;
• wherein the first sequence of undulations alternatively and sequentially follow a first curved path and a second curved path, the second curved path being asymmetric to the first curved path;
• wherein the second base has a second sequence of undulations that are longitudinally disposed along the length of the trough;
• wherein the second sequence of undulations alternatively and sequentially follow the second curved path and the first curved path;
• wherein the first curved path and the second curved path alternate from one side of the septum to the other side of the septum along the length of the trough.