Antennas

The Development of Wide Angle Base Station Antennas from Arrays

Use of flat panel array base station antennas to produce wide angle beamwidths up to 120°
Phased array antennas are traditionally used to produce narrow beams from large apertures. In this mode of operation, every radiating element in the array is broadly co-phased. The radiation pattern of the antenna is then the product of both the individual radiating element characteristic pattern and the array factor....
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A 2.4 GHz Polarization-diversity Planar Printed Dipole Antenna for WLAN and Wireless Communication Applications

Presentation of the design simulation, fabrication and measured performance of a 2.4 GHz polarization-diversity planar printed dipole antenna for wireless communication applications
Technical Feature A 2.4 GHz Polarization-diversity Planar Printed Dipole Antenna for WLAN and Wireless Communication Applications This article presents the design simulation, fabrication and measured performance of a 2.4 GHz polarization-diversity printed dipole antenna for wireless communication applications. Two orthogonal printed dipole antennas, each with a microstrip via-hole balun...
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Low Cost Phased Array Antennas for BWA Applications

Introduction to a low cost electronically steered array offering true-time-delay beamforming for ultra-broad bandwidth
Product Feature Low Cost Phased Array Antennas for BWA Applications e-tenna Corp. Laurel, MD Today, most broadband wireless access (BWA) customer premise equipment (CPE) use fixed-beam antennas. These are generally either reflector (dish), or flat-panel array antennas. These antennas have generally been selected based on value - meeting a...
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Characteristics of a Large Bandwidth Rectangular Microstrip-fed Inserted Triangular Patch in a Circular Slot Antenna

Analysis of the characteristics of a rectangular microstrip-fed triangular patch in a circular slot antenna using the finite-difference time domain (FDTD) method
Technical Feature Characteristics of a Large Bandwidth Rectangular Microstrip-fed Inserted Triangular Patch in a Circular Slot Antenna The characteristics of a rectangular microstrip-fed triangular patch in a circular slot antenna have been analyzed using the finite-difference time domain (FDTD) method. The impedance and bandwidth of the proposed antenna greatly...
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Cost-effective Wireless Antenna Measurement Systems

Introduction to two new antenna measurements systems for single- or dual-axis antenna pattern measurements in the wireless frequency ranges
Product Feature Cost-effective Wireless Antenna Measurement Systems MI Technologies Duluth, GA Two new antenna measurement systems have recently been introduced that add to the MI-3600 antenna measurement product line. The MI-3600 family is comprised of 20 antenna measurement systems for single- or dual-axis antenna pattern measurements in the popular...
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Antenna Selection to Minimize Pointing Requirements

Use of antenna optimization to ensure antenna pointing requirements are kept to a minimum
Technical Feature Antenna Selection to Minimize Pointing Requirements Traditionally, when designing a satellite communications system, an allowance is made in the link budget for pointing loss. The earth station's antenna size is then selected to achieve the desired gain margin. In this article, a different approach called antenna optimization...
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Axial Ratio Measurements of Single Circularly Polarized Antennas

Presentation of a procedure for measuring the axial ratio of single circularly polarized antennas
Technical Feature Axial Ratio Measurements of Single Circularly Polarized Antennas Robert Gunnels Andrew Corp. Orland Park, IL The measurement of antenna axial ratios must be done properly if accurate results are to be obtained. When measuring on a terrestrial antenna test range, a straightforward approach is often used whereby...
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A Large Bandwidth T-shaped Microstrip-fed Ground Plane Slot Antenna

Use of the finite difference time domain method to analyze the impedance of the T-shaped microstrip feedline structure
Technical Feature A Large Bandwidth T-shaped Microstrip-fed Ground Plane Slot Antenna The characteristics of a T-shaped microstrip feeding a ground plane slot antenna have been analyzed using the finite difference time domain (FDTD) method. The impedance and bandwidth of the proposed antenna depend highly on the design parameters. The...
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A High Efficiency Bow-tie Antenna for Impulse Propagation

Presentation of experimental data used to improve the time domain characteristics of a bow-tie antenna
TECHNICAL FEATURE A High Efficiency Bow-tie Antenna for Impulse Propagation An investigation into the problems associated with using modified dipole antennas to propagate temporally short electrical impulses is described. Experimental data is presented which shows that the time domain characteristics of the bow-tie antenna can be improved by reactively...
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A Ka-band Planar Printed Antipodal Linearly-tapered Slot Antenna

Measurement, fabrication and design of a 27 to 32 GHz Ka-band planar antipodal linearly-tapered slot antenna
TECHNICAL FEATURE A Ka-band Planar Printed Antipodal Linearly-tapered Slot Antenna A Ka-band (27 to 32 GHz) planar antipodal linearly-tapered slot antenna (ALTSA) is designed, fabricated and measured. The numerical simulation was performed by 3D finite-element method (FEM). The printed ALTSA has been realized by using an RT/Duroid printed circuit...
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