What is ground plane in patch antenna?
A patch antenna is a type of antenna with a low profile, which can be mounted on a surface. It consists of a planar rectangular, circular, triangular, or any geometrical sheet or “patch” of metal, mounted over a larger sheet of metal called a ground plane.
Are patch antennas directional?
In a patch antenna, most of the propagation is above the ground plane and can have high directional gain.
What is ground plane in microstrip antenna?
The term has two different meanings in separate areas of electrical engineering. In antenna theory, a ground plane is a conducting surface large in comparison to the wavelength, such as the Earth, which is connected to the transmitter’s ground wire and serves as a reflecting surface for radio waves.
What is the polarization of a patch antenna?
The polarization can be either circular or linear depending on the design of the patch. In a patch antenna, most of the propagation is above the ground plane and can have high directional gain. Figure 5.27. Basic Layers in a Patch Antenna
What kind of substrate is used for patch antenna?
A dielectric substrate similar to that shown in Fig. 3.12 was used for a patch antenna, where a ground plane larger than the size of the patch was placed at the bottom side of the substrate.
What are the problems with a patch antenna?
The problem of electrically thick substrate is also a common one for high-frequency antennas on high-permittivity substrates, and high amounts of TM surface waves can result. FIGURE 11.14. Top View of Microstrip-Fed Patch Antenna
How does the microstrip patch antenna radiate?
This also explains why the microstrip antenna radiates but the microstrip transmission line does not. The microstrip antenna’s radiation arises from the fringing fields, which are due to the advantageous voltage distribution; hence the radiation arises due to the voltage and not the current.