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In this paper, a miniaturized tag antenna with BAP (Battery-Assisted Passive Tag) technique is proposed for RFID (Radio Frequency Identification) applications. Compared with conventional passive tag antennas used for RFID, the BAP technique can help increase read rang significantly. Moreover, a modified dipole with tip-loading and a loop is utilized to make the input impedance of the designed tag...
A front end of 8mm polarimetric microwave radiometer is presented in this paper. Simulations and measurements have shown that it has a good performance. The actual measured results show that it has an impedance bandwidth of VSWR<1.25 over 35GHz-39GHz, within which the two ports isolation is lower than −39dB, the gain of it is larger than 21.6dBi and the sidelobe level is less than −20dB. For the...
Double-Y balun is a kind of printed balun with ultra wide bandwidth, which can also realize transformation from different sorts of printed transmission lines and has been widely used in wideband mixer and ultra-wideband antennas. This paper researched on some elements that influent the upper frequency limitation of double-Y balun in practical engineering and presented a design of double-Y balun transition...
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