Sponsored White Papers, Webcasts, and Downloads
TechRepublic Resources
- RF interference: Just how important are antennas
- Being able to co-locate multiple RF systems within millimeters of each other in modern wireless devices is in large part due to reducing RF interference. Many of these "interference-busting" innovations are the result of engineers making improvements to antenna systems. by Michael Kassner
- Tags: Radio Frequency, Radio, Antenna, Radio Frequency Isolation, Ruckus Wireless, Q, Equipment Developer, Advertising & Promotion, Network Technology, Marketing, Networking, Michael Kassner
- Blog posts 2008-06-15
- 802.11n: MIMO really needs smart antennas
- As Wi-Fi standards go, 802.11n has a lot to live up to, especially after hearing how 802.11n's advertised throughput, security, and reliability will allow Wi-Fi to replace existing wired networks. This means 802.11n's RF technology needs to be rock-solid, just like Ethernet cables, while facing ever-changing environmental conditions. ...
- Tags: Device, Network, Signal, IEEE 802.11n, Interference, MIMO, Technology, Antenna, RF, Ruckus Wireless, Antenna Diversity, N, Beamforming, BeamFlex, Path Control Module, Ruckus, Wi-Fi, Wireless LANs, Wireless, Michael Kassner
- Blog posts 2008-05-14
- Two weeks with the Pinnacle PCTV HD Pro Stick
- HDTVs have been one of the hottest consumer electronics categories for the past several years; however, you don't need to invest in an HDTV to get HDTV content. Pinnacle has created the PCTV HD Pro Stick to turn your desktop or laptop into an HDTV. Considering that...
- Tags: HDTV, Laptop Computer, Antenna, Pinnacle, TVs, Tv & Home Theater, Notebooks, Personal Technology, Home Entertainment, Hardware, Notebooks & Tablets, Shawn Morton
- Blog posts 2008-03-14
- iMAT: MIMO without multiple antennas
- Antenna systems are not normally a preeminent topic when it comes to discussions about wireless equipment. That attitude is completely understandable; antennas are just not that interesting to most people. To some, including myself, RF propagation and antenna technology are very worthy discussion topics. My fascination started 40 years ago...
- Tags: Situation, MIMO, Antenna, iMAT, Antenna System, RF, EM, EM Isolation, SkyCross, iMAT Antenna System, Michael Kassner
- Blog posts 2008-02-25
- Hatena Antenna Gadget (gg)
- Lists your hatena antenna. This version is the first release on CNET Download.com.
- Tags: Antenna
- Software downloads 2007-11-08
- How to make the best of 802.11 multipath environments
- In a post titled Wi-Fi 101: Multipath environments and how they affect Wi-Fi propagation, I examined what happens to 802.11 RF signals when they encounter physical obstacles. I would like to take the next logical step and develop quantifiable relationships between three different Line of Sight LoS environments and the...
- Tags: IEEE 802.11, Environment, Technology, Antenna, RF, Free Space Path Loss, Multipath Interference, Diversity Scheme, Receiver, Wireless LANs, Wi-Fi, Wireless, Michael Kassner
- Blog posts 2007-10-30
- Bandwidth Provisioning in Infrastructure-Based Wireless Networks Employing Directional Antennas
- Motivated by the widespread proliferation of wireless networks employing directional antennas, the paper study the problem of provisioning bandwidth in such networks. Given a set of subscribers and one or more access points possessing directional antennas, the paper formalizes the problem of orienting these antennas in two fundamental settings; subscriber-centric,...
- Tags: Bandwidth, Network, Provisioning, Wireless Network, Antenna, Wireless
- White papers 2007-07-10
- Cracking open the Apple iPhone
- The iPhone blends a revolutionary touch-screen interface, music player, and smartphone into a slick package. Come along as we crack open the Apple iPhone and see the hardware the make it run. by Bill Detwiler
- Tags: Apple Inc., Cellular Phones, Consumer Electronics, Personal Technology, apple, iphone, apple iphone, mobile, wireless, Software, Job, Security, SIM Card, Processor, Panel, Web, Apple iPod, Internet, Screen, ARM, Blade, Java, Window, Adapter, Samsung Electronics Co. Ltd., Chassis, Headset, Battery, Memory, 3G, Web Site, Photograph, Camera, Apple iTunes, Cable, USB, Tool, Laptop Computer, Antenna, Chip, iPhone Chassis, TechRepublic Inc., Smart Phones, Keyboards, Media Players, Monitors & Displays, Digital Music, Digital Media, Handhelds, Hardware, Peripherals, Components, Bill Detwiler
- Image galleries 2007-07-03
- Evaluation of a Novel Low Complexity Smart Antenna for Wireless LAN Systems
- A novel smart antenna is described, which is conceived as a low complexity inexpensive upgrade for IEEE 802.11b/g Wireless Local Area Network WLAN systems. Using smart antennas to increase network throughput by improved spatial reuse is not normally possible for systems using the 802.11 Medium Access Control MAC, unless centralised...
- Tags: WLAN, IEEE, Antenna, LANs, Wireless LANs, Wi-Fi, Wireless, Networking
- White papers 2006-11-20
- Mobile Wireless Communication System Antennas for 260 MHz-Band
- Automotive mounted antennae are often vertically orientated 1/4 wave antennae because the body of the car can be used as an effective reflective infinite ground plane. The 1/4 wave antenna has a low cost and is also compact in size. This compact quality is important in automobile mounted antennae because...
- Tags: Mobile, Wireless Communication, Antennae, Antenna, Wi-Fi, Wireless, Advertising & Promotion, Marketing
- White papers 2006-03-26
- Bandwidth and Gain Improvement of a Circularly Polarized Dual-Rhombic Loop Antenna
- This paper presents a novel way to improve the performance of a Circularly Polarized CP dual-rhombic loop antenna. The bandwidth is enhanced by adding a pair of parasitic rhombic loops inside the dual-rhombic loop while the gain is increased with the help of a short backfire antenna. Good impedance matching...
- Tags: Bandwidth, Antenna
- White papers 2006-02-23
- A Turbo-Coded Multiple-Description System for Multiple Antennas
- This paper proposes a joint source-channel coding scheme for wireless communication systems with multiple transmit and receive antennas. The source coder is realized by a multiple description encoder that generates multiple bit streams. Each description is then separately turbo coded and transmitted using multiple antennas. For the receiver, the paper...
- Tags: IEEE, Antenna, Source Coder, Productivity, Wi-Fi, Performance Management, Wireless, Human Resources, Workforce Management
- White papers 2006-02-01
- A Novel Microstrip Patch Antenna With Large Impedance Bandwidth in VHF/UHF Range
- In this paper a novel antenna is presented. This antenna, employing microstrip circular disc as radiator is seen to perform over a large impedance bandwidth (130MHz to 876 MHz). The disk resonator is loaded with L-C-R circuit across a selective location in the disk via a thin shorting pin. The...
- Tags: Bandwidth, Disk, Antenna, Disk Resonator
- White papers 2006-01-09
- Minimized Dual-Band Coupled Line Meander Antenna for System-In-a-Package Applications
- A novel low-profile planar coupled line meander antenna for dual-band operation is presented. The design is based on meandered line principle with a coupled line to achieve two different radiation modes for GSM and DCS applications. Because of the effect of the coupled line, total dimension of the proposed antenna...
- Tags: Antenna, Session Initiation Protocol (SIP), Cellular Phones, Emerging Technologies, Consumer Electronics, Personal Technology
- White papers 2006-01-05
- Design and Testing of a Feed Network for a Transparent Antenna Array
- This paper describes the design and testing of a feed network for a transparent flat plate array antenna. This antenna is the top of a stack of three antennas that must occupy the same volume while pointing in different directions. At many pointing angles, the antenna will create blockage for...
- Tags: Network, Antenna, Networking
- White papers 2005-12-28
- A Class of Multi-Arm Monopole Antennas for Multi-Band Wireless/Mobile Applications
- This paper presents several multi-band, compact, lightweight and low-cost monopole antennas suitable for applications in the Wireless Local Area Network WLAN and mobile communications. These antennas are two-arm microstrip-fed antenna, two-arm antenna fed by a Co-Planar Waveguide CPW line, three-arm microstrip-fed antenna and a diversity antenna pair composed of two...
- Tags: Mobile, Mobile Application, Antenna, LANs, Wireless, Advertising & Promotion, Wi-Fi, Wireless LANs, Networking, Marketing
- White papers 2005-12-16
- A Compact Multi Band PIFA for Wireless LAN Mobile Terminals
- A novel compact Planar Inverted-F Antenna PIFA for laptop computers is presented. The proposed antenna is a multi-band single-feed PIFA operating in the IEEE 802.11a (5150-5350 MHz, 5725-5825MHz), IEEE 802.11b,g (2400-2484 MHz) and HIPERLAN2 (5470- 5725MHz) frequency bands. The broad impedance bandwidth is achieved by combining a trapezoidal feed plate...
- Tags: Mobile, WLAN, Laptop Computer, Computer, Antenna, Wireless LANs, Productivity, Notebooks, LANs, Wi-Fi, Wireless, Hardware, Notebooks & Tablets, Networking
- White papers 2005-12-13
- Use of RFID Technology in Libraries: A New Approach to Circulation, Tracking, Inventorying, and Security of Library Materials
- RFID Radio Frequency IDentification allows an item, for example a library book, to be tracked and communicated with by radio waves. This technology is similar in concept to a cell phone. RFID is a broad term for technologies that use radio waves to automatically identify people or objects. There are...
- Tags: Radio, Antenna, Radio Wave, Reader, RFID, Advertising & Promotion, Wireless, Security, Biometrics, Marketing
- White papers 2005-10-05
- A Topology Control Approach to Using Directional Antennas in Wireless Mesh Networks
- Directional antennas in wireless mesh networks can improve spatial reuse. However, using them effectively needs specialized protocol support at the MAC layer, which is always not practical. The work discussed in this paper presents a topology control approach to effectively using directional antennas with legacy MAC layer protocols such as...
- Tags: Network, Topology, Antenna, Idea, Mesh Networking, Wireless, Networking
- White papers 2005-09-25
- A Novel Compact Cable-Fed Antenna for a GSM/DCS Handset
- By using a branch-line ground plane, a monopole radiator, and parasitic patches, a newly compact cable-fed antenna is investigated in order to overcome the thickness problem of the Planar Inverted-F Antenna PIFA. The designed antenna has dimensions of only 40 12 1 mm and the impedance bandwidth of the proposed...
- Tags: John Wiley & Sons Inc., Antenna, Patches, Cellular Phones, Consumer Electronics, Personal Technology
- White papers 2005-09-05
