Common-Mode Loss Mitigation of a Differentially Fed Eight-port On-antenna Power Combining Patch Implemented in a Scanning Phased Array
Résumé
On-antenna power combining is an emerging topic of high interest, where high-power amplifiers (HPA) are directly connected to a multiport antenna. Compared to other on-circuit power combining technics, improved efficiency, higher radiated power, smaller associated monolithic microwave integrated circuits (MMIC) and enhanced heat dissipation are achieved. This technic can be used in addition to spatial power combination within an array, to further improve the radiated power. However, several of these multiport antennas result in a common-mode parasitic effect, only occurring when the beam is steered, which reduces the radiated power. This paper exposes this phenomenon through infinite array simulations and explains its origin. A solution to mitigate this problem is finally proposed.
Mots clés
Phased arrays
Electromagnetic heating
Cogeneration
Europe
MMICs
Microwave circuits
Microwave antenna arrays
Active antennas
Infinite array
Multiport antennas
On-antenna power combining
Scanning Phased Array
Infinite Array
High PAmplifier
Aperture
Output Power
Phase Difference
Reflection Coefficient
Surface Current
Common Mode
High Symmetry
Current Magnitude
Scanning Angle
Patch Antenna
TM Polarization
TE Polarization