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Miniaturization of dual frequency RFID antenna with high frequency ratio

2007 IEEE Antennas and Propagation Society International Symposium, 2007
We have presented a novel design for dual frequency RFID antenna with high frequency ratio. This antenna works well in both the HF and UHF bands for RFID operation with a single feed. Comparisons between the new design and the previous design are made and the new design is shown to be less than half of the size of the previous design while offering ...
Kin Seong Leong, null Mun Leng Ng, Peter H. Cole   +2 more
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The fundamental frequency - subglottal pressure ratio

First European Conference on Speech Communication and Technology (Eurospeech 1989), 1989
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Strik, H., Boves, L.W.J.
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A 65 nm CMOS Statistical Frequency Ratio Calculator for Frequency Measurement

IEEE Transactions on Industrial Electronics, 2021
In this article, the frequency ratio calculator (FRC) based on the statistical algorithm is proposed to obtain the integer and fractional frequency ratios of an input signal and a reference signal. The function of FRC can be used for fast frequency measurement of an unknown signal.
Yun-Chih Lu, Chi-Hung Wu, Yi-Jan Emery Chen   +2 more
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Miniaturized multiband frequency selective surface with wide frequency ratio

Microwave and Optical Technology Letters, 2022
AbstractThis article presents the design of a novel miniaturized 2.5D frequency selective surface (FSS) for radiofrequency and microwave shielding applications is proposed. The proposed FSS is configured to offer multiple band‐stop characteristics with a wide frequency ratio. The unit cell is developed using traces that run on the top and bottom layers
Anbuselvi Mathivanan, Palani Saravanan
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Compact Dual-Frequency Antenna Array With Large Frequency Ratio

IEEE Transactions on Antennas and Propagation, 2021
A dual-fed dual-frequency shared-aperture antenna array with a large frequency ratio is investigated. Its unit cell consists of a microwave ground-surrounded patch antenna and a millimeter-wave substrate-integrated $2\times {2}$ slot antenna subarray.
Zhen-Xing Xia, Kwok Wa Leung, Nan Yang, Kai Lu   +3 more
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Measurement of optical frequencies and frequency ratios

Measurement Science and Technology, 2003
This paper reviews the history of the phase-coherent measurement of optical frequencies, its present status and future prospects. The development of frequency measurement of optical frequency standards with respect to the frequency of the Cs atomic clock is described.
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Wideband Dual-Frequency Antenna With Large Frequency Ratio

IEEE Transactions on Antennas and Propagation, 2019
This communication investigates a new type of compact dual-frequency antenna, which is realized by using a single rectangular dielectric block with a groove along its center. It integrates a microwave dielectric resonator antenna (DRA) with a millimeter-wave Fabry–Perot resonator antenna (FPRA).
Li Ying Feng, Kwok Wa Leung
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