Transparent Patch Antenna Layout for Stable Feed Matching

The patent applies local quality by selectively placing transparent conductive films only at specific hole portions within the sparse grid pattern of the patch antenna and ground plane, rather than uniformly across the entire structure. This localized approach maintains transparency in non-critical areas while providing targeted electromagnetic functionality where needed for feeding line matching.

The patent uses composite materials by combining transparent dielectric members with transparent conductive films at specific locations. This composite structure allows the antenna to achieve both high transparency from the dielectric material and proper electromagnetic matching from the strategically placed conductive films, resolving the contradiction between transparency and matching difficulty.

By applying transparent conductive films only at specific hole portions rather than uniformly, the patent creates localized electromagnetic compensation zones that stabilize impedance matching conditions. This selective placement allows the sparse grid pattern to maintain its transparency benefits while the targeted conductive regions provide consistent reference planes for reliable impedance matching.

The patent changes the electromagnetic parameters locally by introducing transparent conductive films with specific conductivity characteristics at selected hole portions. This parameter modification allows tuning of the impedance characteristics in critical areas while maintaining the overall sparse grid structure, thereby stabilizing matching conditions across varying operating conditions.