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How good are PCB antennas?
Printed circuit board trace antennas are notoriously difficult to design, implement, and tune; particularly in a small and reliable implementation. Similar to a wire antenna, a trace antenna’s size will depend on the frequencies of the target bandwidth.
What is antenna chip?
Chip antennas are a particular type of antenna valued for their small footprint. They are most commonly integrated in circuit boards to radiate high frequency electromagnetic waves. They have a limited range, making them optimal for small devices such as cell phones and WiFi routers.
Do you need a ground plane for an antenna?
To function as an antenna ground plane, the conducting surface must extend for least a quarter wavelength from the base of the antenna. In reality it is not necessary to have a full circular conducting plate for a ground plane. This would be difficult to manage in terms cost and also the wind resistance.
How does the ground work as an antenna?
It is found that for a monopole antenna like a quarter wavelength vertical, the ground acts as a plane to reflect the radio waves so that an image of the top half of the antenna is seen in the Earth. It is possible to simulate this function by replacing the real earth with a conducting plane.
How many radials do you need for a vertical antenna?
Often four conducting radials are used and these often provide a sufficient simulation of the complete circular ground plane. Vertical antenna with ground plane radials. It is not always necessary to have a minimum of four radials – often even two will suffice.
Why does a quarter wave monopole antenna have a ground plane?
A quarter wave monopole antenna doesn’t have to have a ground plane unless you want it to radiate EM energy with a certain efficiency and pattern. EM radiation requires accelerating electrical charges, which usually implies a voltage differential between two separated areas in space.