| Transitions, Tapered Rectangular
Waveguide to Waveguide - Series 000:
Tapered Transitions provide a gradual dimensional change
between two sizes of waveguide. The larger components
are accurately fabricated from laser cut plates; smaller tapers
are precision electroformed 'in-house'. In applications
where waveguide frequency bands overlap, the Transitions exhibit
low VSWR and low insertion loss. whilst maintaining high mode
purity.
Transitions Tapered Rectangular to Circular Waveguide:
Each Transition consists of a short length of rectangular
waveguide and a stepped or tapered section leading to a circular
waveguide. Models are available fitted with combinations of
port flanges, resistive and dielectric elements.
Polarisation Analysers/Translators: Series 64*:
Flann Microwave offers a range of Polarizers capable of producing
Linear, Circular and Combination polarised output, as well
as forming the basis of Polarisation Analysis systems.
Both manual and programmable models are available covering
the range 4 to 110 GHz, enabling output polarisation to be
continuously varied or selected in incremental steps.
Based on the well known and proven technology found in Flann's
Rotary Vane Attenuators and Phase Changers, all units employ
a combination of precision fixed and rotating waveguide sections,
housing high stability resistive and dielectric elements to
bring about the desired polarisation change. Control
hardware is available both in 'stand-alone' and 'on-a-board'
form, for GPIB or RS232 control.
The more sophisticated models allow a Vertical Linear polarised
input to be converted to Orientated Linear Polarisation, Circular
Polarisation (LH or RH), or any stage in-between (Elliptical
Polarisation). Other units are available which provide
various subsets of these options.
Applications can be split into two main areas; Polarization
Translation and Polarisation Analysis. Polarisation Translators
allow any chosen polarisation to be generated and, in the
case of programmable systems, for this to be varied in a fully
automated control system. Polarization Analysers have uses
in, for example, Radar Profiling Systems and in investigating
the effects of environmental factors (obstructions, meteorological
phenomena etc.) on the polarization of received signals in
microwave communications links, particularly at millimetric
wavelengths.
The specification, design and manufacture of such specialised
custom and semi-custom systems, is typical of Flann's capability
in passive waveguide and microwave antenna technology.
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