/LastChar 196 465 322.5 384 636.5 500 277.8 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 There is nothing mounted on the first major surface of the mounting substrate 2. Found insideThis book is divided into four parts. The first part is devoted to microwave components. The second part deals with microwave ICs and innovative techniques for on-chip antenna design. Curved branches are introduced to contribute to circularly polarized radiation. The two orthogonal components which are same in magnitude and in phase quadrature results in circular polarization. 575 1041.7 1169.4 894.4 319.4 575] 0 0 0 0 0 0 0 0 0 0 777.8 277.8 777.8 500 777.8 500 777.8 777.8 777.8 777.8 0 0 777.8 4. At the same time, the amplitude of the LH circular term (dashed line), is more than 30 dB down. << A circular-polarization antenna, comprising: a pair of linear-polarization surface-mount antennas mounted on said mounting substrate each having a plane of polarization, the surface-mount antennas disposed such that the respective planes of polarization in a direction normal to the mounting surface of said mounting substrate are substantially perpendicular to each other; a phase circuit connected to said pair of linear-polarization surface-mount antennas for at least one of sending thereto and receiving therefrom signals having the same amplitude and a phase difference of 90 degrees to each other; an amplification circuit connected to said phase circuit; a shield case covering said amplification circuit; and. A low-profile wideband metasurface antenna with quad-polarization reconfiguration ability is presented in this paper. Since the emission electrode 93 forms a λ/4 stub having an open end and a ground end, it resonates according to the input signal. >> 12 shows a circular-polarization antenna according to a further embodiment of the present invention. FIG. Since a circular wave reverses direction on reflection, this selection ability increased the probability of not being bothered by multipath. In this paper, a circular polarization microstrip antenna, which can be used in GPS system, is researched. 639.7 565.6 517.7 444.4 405.9 437.5 496.5 469.4 353.9 576.2 583.3 602.5 494 437.5 Found insideIn this volume the main applications for continental hydrology are presented, including the characterization of the states of continental surfaces (water state, snow cover, etc.) using active and passive remote sensing, monitoring the ... /Subtype/Type1 A map and the present position is displayed on the display 115 with a help of the interface section 116 having the mapping system 114 comprising map software in the form of CD-ROM and a remote-control etc. In the surface-mount antenna 20 configured as described above, when a signal is input to the power-feeding electrode 24, the signal is transferred from the power-feeding electrode 24 to the emission electrode 23 through a capacitor 27 formed between the power-feeding electrode 24 and the open end of the emission electrode 23. /Length 2071 endobj Assignors: SHIKATA, MASZRU, KUSHIHI, YUICHI, Application filed by Murata Manufacturing Co Ltd, Assigned to I.D.M. 750 708.3 722.2 763.9 680.6 652.8 784.7 750 361.1 513.9 777.8 625 916.7 750 777.8 Then, an electric field is generated between the emission electrode 93 and the ground electrode 92, and a part of the energy thereof leaks out and is emitted as a radio wave. 9 shows the structure of still another surface-mount antenna used for a circular-polarization antenna according to the present invention. Customizable port location and form factor, adapted to client's requirements; Ka-band example: 20/30 GHz (full Ka-band bandwidth); dual-circular polarization in the two bands with a cross polarization in excess of 27 dB; low insertion loss (typically 0.2 dB); very high isolation (> 90 dB) between bands; weight less than 75 g; Since the current density at one ground end decreases, the conductor loss is reduced and the antenna gain is increased. Form these measurements, it is shown that the benefits of circular polarization hold true both indoors and outdoors. Indeed, the power-handling capacity of this source is essentially limited only by losses, if any, in the dielectric since, by construction, virtually all the matching losses are eliminated, the entire element being made exclusively by means of a symmetrical strip line technology. 3 has only the ground end. /Type/Font The horizontal dipole 10 is made by the transversal extension (i.e. Essentially, the invention provides for extending the supply line by two orthogonal symmetrical strip line dipoles and a phase-shifter inserted between the two dipoles, so as to create a single-block primary source radiating a circularly-polarized wave (it is known, indeed, that to produce a circularly-polarized wave, two neighboring orthogonal dipoles must be excited by signals that have the same amplitude but are in quadrature). More generally, it has been shown 2 that circular polarization can also be achieved by a probe feed located at any point on a locus (x 0, y 0), as shown in Figure 2 for RHCP and LHCP when the patch dimensions depend on the probe location. In addition, since components are required to be mounted on both surfaces of the mounting substrate 101, mounting cost is high. 1. In circular polarization, signal are transmitted on both horizontal and vertical planes with 90 degree phase shift that looks like a spinning corkscrew. 575 575 575 575 575 575 575 575 575 575 575 319.4 319.4 350 894.4 543.1 543.1 894.4 These distributor and phase-shifter means (30) are formed by an axial quarter wave segment of a symmetrical strip line (31, 32, 32' ), said symmetrical strip line segment extending the symmetrical strip supply line beyond the first dipolar radiating element, the branches of the second dipolar radiating element being formed at the end of this symmetrical strip line segment, and the dimensions of this symmetrical strip line segment and the inherent characteristics of its dielectric (33, 33') being chosen so as to excite the dipolar radiating elements by similar respective signals, having the same amplitude but being phase-shifted by 90°. antenna wave feed state circular polarization Prior art date 1982-07-19 Legal status (The legal status is an assumption and is not a legal conclusion. 20. loss and axial ratio of the antennas and the insertion/return loss of the transition are in progress. The invention relates to an improved antenna arrangement which is characterized by the following features: a patch electrode (7) having a patch electrode surface (71) is provided above the dielectric (5) or on the upper face (5a) of the ... When a helical antenna has about 10 turns or more, each turn a full wavelength, then it is a form of traveling-wave antenna. Owner name: 548.6] According to the radio apparatus of the present invention, miniaturization, cost reduction and lowering cost of set up the radio apparatus itself can be achieved by using the circular-polarization antenna of the present invention. 3. Found insideBased on Bahl and Bhartia's popular 1980 classic, Microstrip Antennas, this all new book provides the detail antenna engineers and designers need to design any type of microstrip antenna. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 663.6 885.4 826.4 736.8 8 Antenna gain (G) Because an antenna is a passive device, the power radiated can not be greater than the input power. The radio apparatus of claim 15, further wherein each of the surface-mount antennas has at least a power-feeding electrode, an emission electrode and a ground electrode provided on at least one of a surface of and inside of a substantially parallelopiped-rectangular base member made of at least one of a dielectric material and a magnetic material. The shield plate 16 is made from a conductor such as a metal, and its end is insulated from the mounting substrate 2 and secured, and is also grounded. The radio apparatus of claim 15, further comprising a shield plate provided between said pair of surface-mount antennas. 18(a) is a view seen from the second major surface of a mounting substrate, and FIG. Just this drawback is produced. 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 672.6 877.8 822.9 741.7 713.2 796.5 In the case of linear polarization, we have the decomposition formed by two circular waves in opposite directions and with equal magnitudes. 319.4 575 319.4 319.4 559 638.9 511.1 638.9 527.1 351.4 575 638.9 319.4 351.4 606.9 /Widths[350 602.8 958.3 575 958.3 894.4 319.4 447.2 447.2 575 894.4 319.4 383.3 319.4 The 2017 International Applied Computational Electromagnetics Society Symposium in China (ACES China 2017) serves as a forum for developers, analysts, and users of computational techniques applied to electromagnetic field problems for all ... a circular-polarization antenna, comprising: a shield case covering said amplification circuit; said pair of linear-polarization surface-mount antennas, said phase circuit, said amplification circuit and said shield case being mounted on the same mounting surface of said mounting substrate; and. In FIG. Figure 8: As the mean signal strength decreases, the . Two prototypes, sized 13.3λ 0 by 19.9λ 0 at 20.5 GHz, are fabricated and measured, experimentally demonstrating the proposed concepts. /Type/Font 680.6 777.8 736.1 555.6 722.2 750 750 1027.8 750 750 611.1 277.8 500 277.8 500 277.8 One end of the emission electrode 12 serves as an open end 12a, which is disposed so as to oppose the power-feeding electrode 13 through a gap 14, and the other end serves as a ground end 12b, which is connected to the ground electrode 11 through one end face of the base member 10. FIG. In general, the antennas with switchable polarization are designed to form at least two polarization states, like LHCP and RHCP, while the method to obtain polarization reconfigurability is mainly with the aid of switching devices such as RF MEMS or p-i-n diodes. a receiving section and a signal-processing section connected in series to said circular-polarization antenna, said phase circuit comprising a first microstrip line having a first end and a second end, the first end being divided into a pair of second and third microstrip lines, which are connected to a pair of surface-mount antennas respectively, and the second end being connected to the amplification circuit. CIRCULAR POLARIZATION ANTENNA, ESPECIALLY FOR ANTENNA NETWORK. Found insideThe book describes the precursors and history of metasurfaces before continuing on to an exploration of the physical insights that can be gleaned from the material parameters of the metasurface. The method of claim 27, further comprising disposing said pair of surface-mount antennas such that the respective ground ends thereof are farthest away from each other. /FontDescriptor 8 0 R The polarization of an antenna is the polarization of the radiated fields produced by an antenna, evaluated in the far field. DOI: 10.1109/TAP.2013.2267712 Corpus ID: 5944779. 2. The currents flowing on the strips and along via-holes of the helix contribute to the horizontal and vertical polarizations, respectively. 611.1 798.5 656.8 526.5 771.4 527.8 718.7 594.9 844.5 544.5 677.8 762 689.7 1200.9 27 0 obj I.D.M. 1243.8 952.8 340.3 612.5] Found inside – Page 56High-Gain Feed Antenna ArrayThe reflectarray circular polarization is formed by the feed patch array design. For communication, RHCP is employed; hence, ... FIG. In this letter, we propose a circularly polarized (CP) square antenna that can change the frequency of the minimum axial ratio (AR). FIG. Found insideSpace geodetic techniques, e.g., global navigation satellite systems (GNSS), Very Long Baseline Interferometry (VLBI), satellite gravimetry and altimetry, and GNSS Reflectometry In the surface-mount antenna 90 shown in FIG. The use of dielectric resonator as a resonant antenna was proposed in 1983. Due to the absence of metallic loss, the dielectric resonator antenna (DRA) is highly efficient when operated at millimetre wave frequencies. The electrodes may have other shapes such as a straight or L shape. Through adjusting the structure parameters of the antenna, we obtain the designed circular polarization antenna that operates at 1.575GHz. Indeed, the wave emitted in a given circular polarization, for example a right-hand circular polarization, will be phase-shifted by 180° by reflection on the obstacle and will therefore be sent back with a reverse polarization, a left-hand circular polarization in this example. 1, the circular-polarization antenna 1 includes a mounting substrate 2, surface-mount antennas 3 and 4 mounted on the second major surface of the mounting substrate 2, a shield case 5 for covering an amplification circuit (not shown) mounted on the second major surface of the mounting substrate 2, a phase circuit 6 for connecting the amplification circuit to the surface-mount antennas 3 and 4, and a cable 7 connected to the amplification circuit at one end.
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