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2023
It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.
A modified patch antenna based on the four-port feeds connected with 0°, 90°, 180°, and 270° phase shifters is presented to achieve a broadband circular polarization performance. The impedance bandwidth at or above 10dB return loss is about 620MHz, from 1.07GHz to 1.69GHz. The 3dB-axial-ratio bandwidth is about 610MHz, from 1.12GHz to 1.73GHz. The proposed patch antenna is suitable for high-precision GNSS applications.