Go to GlobalSpec.com Home
Newsletter   FREE GlobalSpec e-Newsletters
Receive the latest news, trends, and technology relevant to your work.
(See Titles)

Planar Antennas

From Remcom (USA)
 

 

The release of an extremely wide spectrum of 3.110.6 GHz for commercial applications has greatly spurred the research and development of microwave ultrawideband (UWB) technology for communications, imaging, radar, and localization applications. In accordance, many techniques to broaden the impedance bandwidth of small antennas and to optimize the characteristics of the broadband antennas have been widely investigated. This article reviews the state of the art in broadband antennas for emerging UWB applications and addresses the important issues of the broadband antenna design for UWB applications. First, a variety of planar monopoles with finite ground planes are reviewed. Next, the roll antennas with enhanced radiation performance are outlined. After that, the planar antennas printing on PCBs are described. A directional antipodal Vivaldi antenna is also presented for UWB applications. Last, a UWB antenna for wearable applications is exemplified.


Product Announcements
CM Complete Lifting Systems - Forged Load Binders
Forged load binders are available in Dixie Industries, Midland Forge, and Durbin Durco brand names. Popular lever and ratchet styles are available as well as specialty binders. (read more)
RUD Chain, Inc. - The Modern Lifting Point
Many manufacturing organizations are unaware that the use of inappropriate lifting points and significantly increases the probability of failures and could ultimately lead to a potentially... (read more)
seepex, Inc. - White Elastomer Stators
Stators with white elastomers are now available for seepex progressive cavity pumps. The stators are made with a kaolin (China Clay) binder, rather than the traditional carbon black binder. All of the... (read more)
Konecranes Inc. - Manual Chain Hoists
Konecranes has a variety of manual chain hoists available. We manufacture both hand chain blocks and manual lever pullers. The load capacities range from 1/4 to 10 tons. (read more)
RUD Chain, Inc. - The StarPoint®
The StarPoint® is the perfect solution to eliminate the unsafe, rigid style eye bolt. The StarPoint® swivels to the direction of the load lift, the WLL is always at the direction of the load. Use of... (read more)
 

Topics of Interest
Overview Organic binders have been known to humanity since the highest antiquity. With liana and interlaced ropes, they discovered the basic jointing technique, both for housing and for household... (Read More)
8.1 RATCHETS AND RATCHET GEARING A ratchet is a form of gear in which the teeth are cut for one-way operation or to transmit intermittent motion. The ratchet wheel is used widely in machinery and... (Read More)
5.1 Overview The various proprietary polymer-modified binders used in the UK asphalt industry are based mainly on thermoplastic elastomers or thermoplastic plastomers (Figures 22 and 23), although... (Read More)
Flanged End Connections Flanged valves are perhaps the most widely used. Flanges used to mate valves with adjacent piping and/or equipment must conform to the following: They must provide sufficient... (Read More)
In the impression die forging process, a press or hammer is used to pound or press metal into the desired shape. The hydraulic presses, mechanical presses and hammers used in this process have... (Read More)