near-field uhf rfid antenna channel width In the design of ultra-high-frequency (UHF) radio frequency identification (RFID) near-field antennas, realising an antenna with electrically large size, wide frequency band, and far read range has always been a challenge. Languages. Kotlin 100.0%. Android NFC read and write example. Contribute to codexpedia/android_nfc_read_write development by creating an account on GitHub.
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discuss basic theory of near and far field antenna coupling in application to RFID and present some experimental measurements with emphasis on physical tag performance. The result indicates that the proposed antenna has the 10-dB impedance bandwidth of 128%, which completely covers the universal UHF RFID band from 840 to 960 . In the design of ultra-high-frequency (UHF) radio frequency identification (RFID) near-field antennas, realising an antenna with electrically large size, wide frequency band, and far read range has always been a challenge.discuss basic theory of near and far field antenna coupling in application to RFID and present some experimental measurements with emphasis on physical tag performance.
The result indicates that the proposed antenna has the 10-dB impedance bandwidth of 128%, which completely covers the universal UHF RFID band from 840 to 960 MHz. The 100% read–write rate is achieved within the read–write distance of 10 .A rule of thumb is that near-field UHF RFID is sufficient up to a distance of about one wavelength, which in UHF frequencies equals about 30 cm or 12 inches. If the reading distance exceeds that, the tag is required to have an antenna structure that is . This paper proposed a novel antenna for ultra-high frequency (UHF) radio frequency identification (RFID) near-field applications with uniform distribution of the electric field along the x-axis (Ex), and the y-axis (Ey).The phase 50 Ω 180° shifter reverses the current on the two microstrip transmission lines. The complementary split ring resonator (CSRR) elements enhance magnetic field strength and produce coupling between microstrip transmission lines. The measured bandwidth of the antenna is 889 to 935 MHz.
A broadband segmented loop antenna is presented for ultra high frequency (UHF) near-field radio frequency identification (RFID) applications. Using a segmented line, the current distribution along the loop is kept in phase even though the perimeter of the loop is more than two operating wavelengths so that the proposed antenna generates strong . The reading areas of the three-branch antenna and the four-branch antenna are 70 mm × 70 mm × 90 mm and 100 mm × 100 mm × 120 mm (length × width × height), respectively. Due to the introduction of the ground plate, the antenna gain is low, which meets the design requirements of near-field antennas. 1. Introduction.This paper presents two near field reader antennas for applications in the UHF radio frequency identification (RFID) system. Strong vertical and horizontal magnetic fields in near zones are respectively excited by those two reader antennas, so that the readable distance of the nearfield tags attached on objects can be enhanced significantly. An ultra-high frequency (UHF) travelling wave antenna based on complementary split ring resonator (CSRR) element is investigated in this study for pure near-field radio frequency identification (RFID) system.
In the design of ultra-high-frequency (UHF) radio frequency identification (RFID) near-field antennas, realising an antenna with electrically large size, wide frequency band, and far read range has always been a challenge.discuss basic theory of near and far field antenna coupling in application to RFID and present some experimental measurements with emphasis on physical tag performance. The result indicates that the proposed antenna has the 10-dB impedance bandwidth of 128%, which completely covers the universal UHF RFID band from 840 to 960 MHz. The 100% read–write rate is achieved within the read–write distance of 10 .
A rule of thumb is that near-field UHF RFID is sufficient up to a distance of about one wavelength, which in UHF frequencies equals about 30 cm or 12 inches. If the reading distance exceeds that, the tag is required to have an antenna structure that is .
uhf rfid reading distance
This paper proposed a novel antenna for ultra-high frequency (UHF) radio frequency identification (RFID) near-field applications with uniform distribution of the electric field along the x-axis (Ex), and the y-axis (Ey).The phase 50 Ω 180° shifter reverses the current on the two microstrip transmission lines. The complementary split ring resonator (CSRR) elements enhance magnetic field strength and produce coupling between microstrip transmission lines. The measured bandwidth of the antenna is 889 to 935 MHz.A broadband segmented loop antenna is presented for ultra high frequency (UHF) near-field radio frequency identification (RFID) applications. Using a segmented line, the current distribution along the loop is kept in phase even though the perimeter of the loop is more than two operating wavelengths so that the proposed antenna generates strong .
The reading areas of the three-branch antenna and the four-branch antenna are 70 mm × 70 mm × 90 mm and 100 mm × 100 mm × 120 mm (length × width × height), respectively. Due to the introduction of the ground plate, the antenna gain is low, which meets the design requirements of near-field antennas. 1. Introduction.This paper presents two near field reader antennas for applications in the UHF radio frequency identification (RFID) system. Strong vertical and horizontal magnetic fields in near zones are respectively excited by those two reader antennas, so that the readable distance of the nearfield tags attached on objects can be enhanced significantly.
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near-field uhf rfid antenna channel width|uhf rfid