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Analysis and design of a new sinuous plane spiral antenna is researched in this paper. On the basis of Archimedean spiral antenna, a scheme that combing a new type cell of sinuous antenna and microscrip dielectric antenna is presented to implement wide beam and dual-circular polarization. Simulation results indicate that the sinuous antenna has good properties during the required frequency range 2...
A novel reconfigurable PCB antenna for 2.4 GHz wireless consumer product is proposed in this paper. The emphasis is to reduce the design and development time, and hence Time to Market. The proposed antenna and mechanical reconfiguration methodology have been verified from measurements by fabricating the antenna on various PCB size. FR4 PCB is chosen since it is widely used in industry for most consumer...
This paper presents the design of high gain compact size pyramidal horn lens antenna for 71–76GHz band. The horn antenna aperture is covered by a planar single layer all dielectric lens that is composed of two dimensional periodic unit cells of λ/2 periodicity and low loss (≤1dB). The unit cell is used to design a 21 unit cell × 21 unit cell flat lens which occupied an area of 42mm × 42mm × 4.35mm...
A novel compact four bands antenna with coplanar waveguide feed is proposed for satisfying GSM, WLAN and WIMAX. Based on the triangle planar patch element, two different slots were embedded. The simulation of the antenna is performed by using software Ansoft HFSS and the results present that the number of multiband, the central of frequency and bandwidth can be controlled by the dimensions of the...
The feasibility of using the spherical wave method (SWM) to analysis the shaped beam, singly curved reflector antennas is investigated in this paper. It is shown that for low sidelobe level (SLL) beams, or main beam scanned, the reflector length is longer than the line source length, but the cylindrical wave method (CWM) couldn't deal with this additional part. Calculated results by the SWM and the...
A dual-band circle polarization microstrip antenna at 1.57GHz and 2.45GHz is presented. We adopt double patch model and feed the top patch through the coaxial feed. Cutting angle and choosing appropriate feeding point was adopted to realize circular polarization of the two patches. The down patch can obtain a good match by moving the top patch. The performance change of the antenna by moving the top...
A compact planar broadband antenna is presented. The antenna is proposed with small size of 12×18mm2 including the GND, which is designed to cover an ultra-wide bandwidth from 3.04 to 17.34 GHz for S11 ≤ −10dB. The antenna is effectively designed and simulated with good broadband impedance matching and stable radiation pattern characteristics in the whole frequency band of use.
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 small size circularly polarized (CP) patch antenna by the use of parasitic ellipse-shaped shorting strips is presented in this paper. These parasitic shorting strip elements which provide capacitive and inductive loading effects to the patch can reduce the size of antenna. The total area of reduction is more than 61% in comparison with the conventional half-wave patch antenna. The antenna works...
A historical 34-slot travelling wave, end-fire rectangular waveguide antenna that has not been previously qualified is examined using a commercially available software. Structurally, this antenna has some advantages over other travelling or leaky-wave antennas that could be used for 24GHz ISM band radar onboard a multirotor UAV, due to the all metal construction. The radiation pattern characteristics...
A novel circularly polarized slot antenna fed by coplanar waveguide (CPW) is presented in this paper. The proposed antenna consists of a square slot cut on the ground and a CPW feed line with a stepped impedance transformer. Two stubs are embedded in the CPW feed line to excite circular polarized wave while a slit is cut on the ground to enhance the impendence bandwidth. The measured impendence bandwidth...
In this paper, a reflector antenna fed with a double-ridged conical horn which aims to work from 10 to 40 GHz is proposed. The simulated horn structure is characterized by its being relatively compact in size, making it versatile in many applications. In addition, a quadruple-ridged conical feed horn is also introduced in the paper as a supplement.
Time-domain broad-band antenna usually used for transmitting and receiving electromagnetic pulse signal. A miniaturization plate monopole broad-band ring antenna fed by coplane waveguide was proposed, through researching on the basic parameters that as sign of broad-band antenna's timedomain characteristic and analyzing the characteristic of microwave pulse time-domain test antenna, and this antenna...
In this paper, a reflectarray antenna working for C-band, which is composed of two typical elements, is proposed and analyzed. The full wave analysis results show that it can achieve a good bandwidth of 16 percent and radiated efficiency of 36 percent by adjusting the size of the alternative elements. The phase-shift range could obtain over 360 degree attainable by combining the two curves of phase-against-size...
This paper discusses the microwave power transmission (MPT) system designs to obtain the maximum direct current to direct current (dc-dc) efficiency at a low budget. The truncated taper function level distribution of the transmitting antenna aperture is suggested to get higher microwave capture efficiency. The receiving rectennas could obtain the maximum microwave to direct current (mw-dc) conversion...
Microwave power transmission is the key of space solar power station. Microwave power transmitting array is introduced firstly. Using Wilcox expansion spatial structure of electromagnetic field is discussed, especially in the Fresnel region. Power distribution is depicted subsequently.
A novel near-field measurement method for predicting far-field monostatic RCS of targets is studied. With the two-dimensional problem as an example, the theory and algorithm of near-field to far-field transformation for this measurement method are derived. With the two-dimensional perfect conductor plate as the target under test, the computer simulation of this measurement method is performed. The...
A design of epsilon-near-zero (ENZ) medium consisting of metallic wires was presented in this paper. According to the theory, structures proposed here could squeeze electromagnetic (EM) energy and let EM wave tunnel through with negligible loss. We verified the tunneling effect in both two dimensional (2D) and three dimensional (3D) structures firstly. And then we proposed a 2D design of ENZ structure...
In this paper, a novel wideband waveguide-to-microstrip transition is proposed and designed, which transforms a waveguide port to a microstrip port via a substrate integrated waveguide (SIW) transformer. The operation frequency covers the full frequency bands of the WR-51 waveguide and the WR-43 waveguide from 14.5 GHz to 26.7 GHz. The simulation results show that the insertion loss is less than 0...
This paper presents the theory, design, fabrication and measurements of high gain compact size horn lens antenna for next generation gigabit point-to-point wireless communications at E-band (71–76GHz and 81–86GHz). A wide flare angle pyramidal horn antenna is integrated with fully flat inhomogeneous low loss (<2dB) dielectric lens that is covering the horn antenna aperture without additional impedance...
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