What is the middle frame antenna slot made from?

Slot radiators or slot antennas are antennas that are used in the frequency range from about 300 MHz to 25 GHz They are often used in navigation

A simple and compact slot antenna with a very wide tuning range is proposed A 25 mm (roughly equal to lambda8, where lambda corresponds

hart op slot A simple and compact slot antenna with a very wide tuning range is proposed A 25 mm (roughly equal to lambda8, where lambda corresponds

dewa 99 slot It is shown that a properly designed, off- centered, microstrip-fed, moderately wide slot antenna shows dual resonant behavior with similar radiation