Contents
What are requirements for an antenna used in mobile phone?
Mobile phone antenna should have a low directivity, because is not useful to use an antenna with high directivity, that is the received signal it can be from different directions. On the other hand the base station needs a high directivity.
Which type of antenna is used in mobile?
The most common outer antenna used with mobile phone is helical antenna and the most common used inner antenna type is microstrip patch antenna.
How can you utilize mobile antenna efficiently?
For efficient radiation at mobile/cellular phone frequencies, the antenna must essentially be the size of the whole device. This means the antenna is not an isolated component, but will use the entire structure of the phone in order to make the antenna.
Do mobile phones have antenna?
Cell phones contain at least one radio antenna in order to transmit or receive radio signals. An antenna converts an electric signal to the radio wave (transmitter) and vice versa (receiver). In addition to the cellular antenna, they may also have Wi-Fi, Bluetooth and/or GPS antennas.
What is a mobile antenna?
Mobile antennas are designed to be used for operation while in motion. Their uses include pedestrian mobile operation while walking, bicycle-mounted antennas for use while riding, and the most common form, automobile-mounted antennas for use while driving.
Is microstrip antenna used in mobile?
The PIFA is common in cellular phones (mobile phones) as a built-in structure. These antennas are derived from a quarter-wave half-patch antenna. The shorting plane of the half-patch is reduced in length which decreases the resonance frequency. It offers a low profile and also with acceptable SAR properties.
Where is antenna in mobile?
The location of the primary cellular antenna will almost always be at the lower end of the device.
What is the most commonly used antenna in cell phones?
Planar Inverted-F Antennas (PIFAs) PIFAs have been one of the most commonly used internal antennas in the mobile phone market. A PIFA is basically a quarter-wavelength patch antenna over a ground plane, having also one or more inductive ground connections, generally close to its feed.
What is dB gain on antenna?
Antenna gain is the ability of the antenna to radiate more or less in any direction compared to a theoretical antenna. If an antenna could be made as a perfect sphere, it would radiate equally in all directions. Omni antennas typically radiate with a gain of 2.1 dB over an isotropic antenna.