rfid tag antenna gain RFID tags should be mounted transverse to the radial direction from the reader antenna as much as possible, and never along the radial direction. Using more than one antenna certainly helps the situation as shown below.
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2. Antenna Gain and Range. A key factor in the performance of an RFID antenna is its gain, which refers to the ability of the antenna to direct RF energy in a particular direction. Higher gain antennas focus the signal on a narrower beam, which can significantly increase the read range but may reduce coverage in other directions. EE Times Explores RFID Antenna Gain and Range With Various Types Of Antennas. Plus, Learn About Radiation Patterns, EIRP, ERP, and The Friis Equation.
Several factors determine the read range generated by an RFID antenna such as reader transmit power, amount of cable loss, coupling technique, antenna gain, and antenna beamwidth. A key aspect of any RFID antenna is whether it is a far-field or near-field antenna. A high gain antenna increases the power received from the RFID reader. A longer range RFID system would typically need an antenna with a gain of 8 dBi or more. While a shorter range RFID system would likely need for an antenna with a gain of 7 dBi or less.EIRP is defined as the amount of power that a theoretical isotropic antenna would emit to produce the peak power density observed in the direction of maximum antenna gain. For example, a typical RFID reader generates 30 dBm (decibels relative to a miliwatt) of RF power.
RFID tags should be mounted transverse to the radial direction from the reader antenna as much as possible, and never along the radial direction. Using more than one antenna certainly helps the situation as shown below. A typical patch-type RFID antenna has a gain of about 6 dBi and looks like the broad beam pattern above. The designer might like to improve the read range by using an antenna with a higher gain, like the narrow beam antenna above, if . We’ll look at how we can make use of COMSOL Multiphysics® simulation software to determine the operating read range of a passive RFID tag powered by a reader’s interrogating field. Additionally, we will look at how we can maximize this operating range by optimizing the tag’s antenna design.For this reason, CP patch antennas are the most common in UHF RFID applications. There is a cost, however, because CP antennas have a 3 dB reduction in gain for reading linearly polarized tags. Similarly, CP tag antennas may be used with linearly polarized reader antennas.
This article will introduce and answer the types, characteristics and application scenarios of the basic RFID antenna, as well as how to select the appropriate antenna according to specific needs. 2. Antenna Gain and Range. A key factor in the performance of an RFID antenna is its gain, which refers to the ability of the antenna to direct RF energy in a particular direction. Higher gain antennas focus the signal on a narrower beam, which can significantly increase the read range but may reduce coverage in other directions.
EE Times Explores RFID Antenna Gain and Range With Various Types Of Antennas. Plus, Learn About Radiation Patterns, EIRP, ERP, and The Friis Equation.Several factors determine the read range generated by an RFID antenna such as reader transmit power, amount of cable loss, coupling technique, antenna gain, and antenna beamwidth. A key aspect of any RFID antenna is whether it is a far-field or near-field antenna. A high gain antenna increases the power received from the RFID reader. A longer range RFID system would typically need an antenna with a gain of 8 dBi or more. While a shorter range RFID system would likely need for an antenna with a gain of 7 dBi or less.
EIRP is defined as the amount of power that a theoretical isotropic antenna would emit to produce the peak power density observed in the direction of maximum antenna gain. For example, a typical RFID reader generates 30 dBm (decibels relative to a miliwatt) of RF power. RFID tags should be mounted transverse to the radial direction from the reader antenna as much as possible, and never along the radial direction. Using more than one antenna certainly helps the situation as shown below.
A typical patch-type RFID antenna has a gain of about 6 dBi and looks like the broad beam pattern above. The designer might like to improve the read range by using an antenna with a higher gain, like the narrow beam antenna above, if . We’ll look at how we can make use of COMSOL Multiphysics® simulation software to determine the operating read range of a passive RFID tag powered by a reader’s interrogating field. Additionally, we will look at how we can maximize this operating range by optimizing the tag’s antenna design.For this reason, CP patch antennas are the most common in UHF RFID applications. There is a cost, however, because CP antennas have a 3 dB reduction in gain for reading linearly polarized tags. Similarly, CP tag antennas may be used with linearly polarized reader antennas.
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