Abstract:
Conventional rectangular waveguides are commonly
used for high power and other microwave and millimeter-wave
applications. Their use at lower frequencies has been limited by
their bulky nature. A new type of compact waveguide called a
partial H-plane waveguide has previously been proposed that
has only one quarter of the cross-sectional area of a conventional
waveguide. However, only limited information relating to the
feeding of such waveguides is available. This paper presents
two types of transitions to partial H-plane waveguides from the
coaxial and microstrip transmission mediums. Additionally, in
the coaxial case, the transition is end-launched to offer collinear
properties. The development of both transitions is discussed and
optimized designs presented with simulated and measured results
over -band (3.95–5.85 GHz).
