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This paper present a design and miniaturization of rectangular patch antenna with balanced feed. The miniaturized patch antenna for a passive radio frequency identification (RFID) tag witch can operate in the ultra-high frequency (UHF), the resonant frequency is 915MHz. The simulation was performed in High Frequency Structure Simulator Software (HFSS). The miniaturized antenna has an acceptable results...
A novel realisation of high gain and compact slotted planar patch antenna for the radio frequency identification (RFID) application is presented here. The antenna was printed on a dielectric Flame Retardant FR-4 Epoxy substrate of dielectric constant (εr=4.3). Simulated results obtained for this antenna exhibits resonant frequency of 5.8 GHz, better return loss of -36.91 dB, high gain of 8.308 dBi,...
A novel UHF RFID tag antenna with broadband and circularly polarized feature has been proposed for metallic object application. Double-point orthogonal coupling feed technology utilizes two microstrips with the differ of a quarter-wavelength and loading cross-slot on the quasi-square radiation patch. Finally the tag antenna achieves 38 MHz and 16.2 MHz for the 3dB impedance bandwidth (898MHz-936MHz),...
The purpose of this paper is to propose a new high gain RF identification (RFID) tag antenna on 915 MHz band for the underground localization applications. The proprieties of the new RFID antenna are investigated in terms of implementation and performance; the study focuses on the substrate of the printed microstrip RFID antenna to increase the gain and then ensures large reading range. Several operations...
A new UHF RFID tag antenna used on the surface of a metallic object is proposed in this paper. In practical RFID applications, metals appear in many occasions. However, the UHF band is very sensitive to metal. When the tag antenna is near a metal, its impedance matching, radiation efficiency and directivity change and the reading distance is reduced so quickly that it cannot work. Therefore, it's...
This paper presents the design of a passive RFID tag antenna operating at 2.45 GHz. The electromagnetic simulation software called CST is used for design and simulation. A high gain (5.842dB), a good impedance matching with the microchip (−30.0 dB Return Loss) and a satisfactory read range performance (upto 5 m) was obtained. One approach of designing RFID tag is that the tag should be less sensitive...
A novel folded microstrip patch-type antenna design suitable for radio frequency identification (RFID) tags and mountable on the cigarette carton surfaces is presented. The cigarette carton contains conductive material and significantly affects the radiation properties of the antenna, so identifying cigarette carton is a challenge. For low-cost fabrication, the antenna is printed on a 45um-thick FCCL...
A tag antenna mountable on a metallic surface is investigated. The tag size is 10.08cm by 4.9cm. Two compact photonic band gap (UCPBG) elements with a ground plane are differentially connected as a radiating unit. By this way, high impedance surface may be realized. While using a larger conductor ground plane, the reader range is around 1.6m.
A circularly polarized patch antenna is proposed to operate at 902-928 MHz for Radio Frequency Identification (RFID) reader applications. The antenna is composed of a U-shaped strip and a square patch with truncated corners. By means of the U-shaped strip feed technique, the VSWR of the patch antenna is less than 1.2. In addition, the structure of the proposed antenna is simple and low-cost. Simulation...
The compact RFID tag antenna with two L-shaped strips and two shorting pins is proposed for metallic objects application. The two L-shaped strips are used to increase impedance bandwidth, and the two shorting pins are used to reduce the influence of metallic objects. The measured 10 dB impedance bandwidth of the proposed antenna has about 32 MHz (898-930 MHz), which covers the UHF band in America...
Radio Frequency Identification (RFID) technology is widely used for automatically identifying and tracking objects. Specifically Ultra High Frequency (UHF) (900 MHz) RFID technology is rapidly expanding because it offers the best tradeoffs between read range, cost, and size. UHF RFID has been focused on supply chain management, serving the needs of manufacturing, distribution and shipping. The low...
In this paper, three compact printed monopole antennas are designed for use in UHF RFID that contain a chip with input impedance of 8.2-J61Ω. The challenges in the design of these antennas are conjugate matching of the antenna to the chip while achieving a small layout area. Inductive coupling via a printed loop is employed to eliminate the need for a matching circuit with lumped components. For each...
In this paper, we present the design of a low-profile planar microstrip patch-type UHF RFID tag antenna that is mountable on metallic surfaces. In this design, the size of antenna has been emphasized to be limited within a standard 4" x 2" size. This novel antenna structure does not require any shorting plate or via hole, so it is suitable for fabrication using the current RFID tag manufacturing...
In this paper, we present a design of a low-profile PIFA array antenna for a RFID tag mounted on metallic objects. With shorting pins placed at the inner edges of the patches, two quarter-wavelength microstrip lines with two additional matching stubs are needed in order to achieve conjugate impedance matching, and a broadband operation can be obtained. The effect of the spacing between the PIFAs on...
It is well-known that UHF RFID tag performance degrades when placed near metal. While the mechanisms for how dipole performance degrades near metal is known, it is generally not known how the parameters of the T-match change in the presence of metal, and what, if anything, can be done to improve near-metal performance. In this paper, we develop a set of expressions that describe the affect of antenna...
A compact and reusable platform-tolerant RFID tag antenna with a novel feed method is proposed. The radiator of this antenna consists of a pair of shorted patches, which can be seen as cavity-backed slot antenna or two PIFA antennas. A small loop pasted on paper is used to connect to RFID chip. With the loop size changing, the input impedance of the antenna can be easily adjusted to match all kinds...
A low-cost, wideband antenna for radio frequency identification (RFID) tags mountable on metallic surfaces is presented. A novel proximity-coupled feed structure, in which the direction of the microstrip feedline is parallel to that of the resonant length of the radiating patch and one end of the feedline is shorted to the ground, is proposed to perform simple and wideband impedance matching between...
Design of a simple compact printed microstrip fed U-shaped monopole antenna for the wireless and radio frequency identification (RFID) is presented. The antenna has two different resonant paths (forming a U-shaped structure), supports two resonances around 1.84 GHz and 5.82 GHz, which are reserved for GSM 1800/PCS and RFID applications respectively. Effectively consistent radiation pattern and large...
Design of a simple microstrip fed monopole patch antenna for the radio frequency identification (RFID) is presented. The antenna has two different resonant paths (forming an inverted double L-shaped structure), supports two resonances around 2.41 GHz and 5.85 GHz, which are reserved for RFID applications. Effectively consistent radiation pattern and large impedance bandwidth has been observed. Impedance...
Design of a simple microstrip fed monopole patch antenna for the radio frequency identification (RFID) is presented. The antenna has two different resonant paths (forming a C-shaped structure), supports two resonances at around 2.41 GHz and 5.85 GHz, which are reserved for RFID applications. Effectively consistent radiation pattern and large impedance bandwidth has been observed. Impedance bandwidth...
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