Septum feed revisited - Ok1dfc.com

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FIG.1 Modify septum <strong>feed</strong>
The following measurements have been performed:I. Impedance Match at RX and TX PortsII. Impedance Match Changes against a Conductive PlateIII. Comparison of Radiation Characteristics at RX and TX PortsIV. Radiation Patterns at both Ports with Various Choke PositionsV. Feed Pattern Frequency DependencyVI. Isolation Between PortsVII. Phase Center PositionI. Impedance Match at RX and TX Ports.Measurement condition: Choke flush, free space.An ANRITSU S400A Site Master transmission line and antenna analyzer was used forthese measurements. Results are shown in FIG 3.
Page 1: Septum Feed Revisitedby Rastislav G
Page 5 and 6: FIG 4Impedance Match Changes agains
Page 7 and 8: Normalized radiation patterns at th
Page 9 and 10: FIG.12
Page 11 and 12: FIG.14The resulting dish antenna ef
Page 13 and 14: measurements for the appropriate pl
Page 15 and 16: FIG 18Radiation Pattern, TX Port, F
Page 17 and 18: Very good isolation between ports,

Septum feed revisited - Ok1dfc.com

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