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XCAF-11L type antenna
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Detailed description
The XCAF-11L type antenna is mainly used in the 902~928MHz radio frequency identification system, the center frequency is 915MHz, and can be directly connected to the reader through the coaxial cable. The antenna has the characteristics of small size and easy installation, which can be well matched with coaxial cable and has good directivity.
Linear polarization mode of antenna
The antenna radiates electromagnetic waves to the surrounding space. The electromagnetic wave is composed of an electric field and a magnetic field, and the direction of the electric field is the polarization direction of the antenna. The polarization mode of the XCAF-11L type antenna is linear polarization, and the so-called linear polarization wave refers to the motion track of the end point of the electric field vector in the electromagnetic wave as a straight line. The direction of the electric field vector in the electromagnetic wave is perpendicular to the orbital plane, which is a vertically polarized wave; the direction of the electric field vector is parallel to the orbital plane, which is a horizontally polarized wave. That is to say, the reading range of the antenna is linear. Although the reading and writing range of the antenna is slightly narrower than that of the general circularly polarized antenna, the reading and writing distance is far away. The antenna radome material used for ABS engineering plastic, is a low gain antenna.
The role of the antenna
The role of the antenna is to transmit radio frequency signals between the electronic tag and the reader. The reader of the RFID system must emit energy through the antenna to form an electromagnetic field, and identify the electronic tag through the electromagnetic field. It can be said that the electromagnetic field range formed by the antenna is the readable area of the radio frequency system. Sometimes the RFID system is transmitted and received by an antenna at the same time; sometimes the RFID system is transmitted by one antenna and received by another antenna. The form and number of antennas used should depend on the specific application.
standing wave ratio curve
The standing wave ratio curve of the XCAF-11L antenna in its working frequency range is relatively flat, and the value is small, which indicates that the antenna works well at this time. When the frequency range is exceeded, the standing wave ratio value of the antenna increases sharply, and the performance of the antenna drops sharply.
directivity of antenna
The antenna has different radiation or reception capabilities for different directions in space, which is the directivity of the antenna. The maximum direction of the antenna radiation is in the normal direction perpendicular to the surface of the antenna, and the radiated energy is basically concentrated in this direction. On the back of the antenna, the radiated energy is very small. Once the shape and size of the antenna are set, the direction of the antenna is also set, so the distance of reading the tag depends entirely on the power transmitted by the reader.
◆Product parameters
physical parameters
Size: 294 x 294 x 64mm
Weight: 1.5kg
Radome material: ABS engineering plastic
Environmental parameters
Working temperature:-40 ℃ ~ 85 ℃
Relative humidity: ≤ 95%
Performance parameters
Operating frequency band: 902~928 MHz
Center frequency: 915MHz
Polarization mode: linear polarization
Standing wave ratio: ≤ 1.3
Antenna gain: 7.15dBi
Characteristic impedance: 50 Ω
Half-power beam width: E plane 70 °,H plane 70 °
Joint mode: N type
* The above parameters may change, please refer to the actual parameters, please understand the inconvenience.
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