Initial Design and Optimization of Broad-Band and Dual-Band Square-to-Circular Waveguide Transitions

Børnemann, Jens; Mokhtaari, Marjan

doi:10.1109/apmc.2005.1606366

Cited by 4 publications

(2 citation statements)

References 8 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, we can have a return loss below −40 dB at just a few wavelengths. However the return loss curve does not show the deep minimas as present in other designs [1]. The lofted transition shows some increase in radial wavenumber of the lowest order mode.…”

Section: Example Case and Numerical Analysismentioning

confidence: 80%

See 1 more Smart Citation

Design of a Broadband Transition Using the Constant Impedance Structure Approach

Murk

2009

PIER Letters

View full text Add to dashboard Cite

Abstract-Transitions from circular waveguides to rectangular waveguides are used in many situations. One particular case is between the feed of a circular corrugated horn antenna and following rectangular waveguide structures. Since the field patterns are not the same on both sides the conversion from rectangular to circular waveguide always results in a certain amount of power reflected back in one waveguide. Much effort has been put in designing special converters which reduce this effect. For many designs, reflection is reduced by introducing a certain number of waveguide steps. By adjusting the distance between these steps, one can get destructive interference of the returned signal at specific frequencies. In this paper, an alternative approach, the constant impedance structure (CIS) has been chosen. This eliminates the need to design a waveguide converter for minimum return loss at discrete frequencies. The transition obtained by this approach is compared to a transition based on linear surface interpolation.

show abstract

Section: Example Case and Numerical Analysismentioning

confidence: 80%

“…On the other hand, in terms of electrical performance, this design exceeds the drilled conversion. A very promising design for a waveguide converter places several pieces of constant cross-section between the circular and rectangular waveguide [1,2]. At each junction, some power is returned.…”

Section: Introductionmentioning

confidence: 99%