Fullwave analysis of non-contacting rotary joint choke sections using the generalised scattering matrix (GSM) approach

Ku Band Rotary Joint Design for SNG Vehicles

“…Design and development of rotary joints have been reported in [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. A single channel RJ presented in [1] consists of two septum polarizers.…”

“…In [4], it is shown that incorporating ridge-waveguide sections, a single-channel waveguide RJ can be designed, which simultaneously provides high power handling capability up to peak power of 250 kW. In [5], full wave analysis of non-contacting RJ choke design is elaborated. Analysis is summarized for the possibilities including linearly polarized TM 01 and/or TE 01 modes in circular waveguide, circulary polarized TE 11 modes in circular waveguide, or TEM modes in coaxial waveguide.…”

Dual frequency coaxial rotary joint with multi-stepped transition

“…Design and development of rotary joints have been reported in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. In practical applications, it is required that the RF rotary joint should incorporate different channels with specified isolation between the channels.…”

“…This paper does not elaborate the transition and matching sections used to realize the hardware. In [5], full wave analysis of non-contacting rotary joint choke section is presented. This consists of two identical TE 01 mode converters, clasping each other by a bearing.…”

“…A rotary joint operating at 35.0 GHz is presented in [2]. In the work of McNamara and Hildbrand [5], different types of possible waveguide modes suitable for rotary joints are described with expression for internal surface currents for different modes. The measured transmission was 97% with a 3 dB bandwidth of 8.5 GHz.…”