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- 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
- 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
- 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
- The Art of UHF RFID Antenna Design: Impedance Matching and Size-Reduction Techniques
- Radio Frequency Identification technology based on the reader/tag paradigm is quickly permeating several aspects of the everyday life. The electromagnetic research mainly concerns the design of tag antennas having high efficiency and small size and suited to complex impedance matching to the embedded electronics. Starting from the available but fragmented...
- Tags: Antenna, University Of Rome, RFID, Productivity, Advertising & Promotion, Marketing Research, Wireless And Mobility, Security, Biometrics, Marketing
- White papers 2008-01-01
- Broadband Stacked Patch Antenna for Bluetooth Applications
- Microstrip patch antennas are well suited for wireless Local Area Network LAN application systems due to their versatility, conformability, low cost and low sensitivity to manufacturing tolerances. Conventionally patch antennas have showed a narrowband response, implicating low bit rate transfer. Recently the importance has been placed upon creating patch antennas...
- Tags: Bluetooth Application, Broadband, Antenna, Network Technology, Broadband Internet, Telecommunications, LANs, Networking
- White papers 2009-02-03
- Two Element Planar Dipole Array Antenna for Wireless LAN
- Off late, the demand for Broadband Internet Connection has been expanded. However, a lot of digital divide areas still exist. In these areas, the introduction of optical fiber and public wireless LAN is difficult in terms of profitability. As the countermeasure to these digital divide, the introduction of "Wireless LAN...
- Tags: WLAN, Antenna, Wireless, LANs, Wireless LANs, Wi-Fi, Wireless And Mobility, Network Technology, Networking
- White papers 2009-03-25
- Chip Antenna for 5.2 GHz Wireless LAN
- The authors have proposed two types of microstrip antennas printed on the parallelepiped dielectric chip for the Bluetooth system and the 5.2 GHz wireless LAN. These antennas are excited by the electromagnetic coupling. For the Bluetooth system, the rectangular patch conductor is printed on the chip and excited by the...
- Tags: LAN, Millimeter, WLAN, Antenna, Chip, Wireless, Semiconductors, Network Technology, Hardware, Networking
- White papers 2009-03-25
- MININEC Pro 1.0.1 (Mac)
- MININEC Pro is an antenna analysis program for Windows and Macintosh computers. Any type of antenna may be analyzed. The physical design of the antenna is entered such as the lengths of wires and elements. For a given frequency, the feedpoint impedance is calculated, along with theoretical efficiency.
- Tags: Apple Macintosh, Antenna, Black Cat Systems, MININEC Pro, Desktops, Microsoft Windows, Hardware, Operating Systems, Software
- Software downloads 2009-01-03
- RF Toolbox OSX 3.7 (Mac)
- RF Toolbox helps with the design of the following types of antennas: Dipole Fat Dipole Yagi J-Pole Super J-Pole Log Periodic Cubic Quad Vertical It also assists with the following calculations: Coil Design LC Filter Design Transmission Line Loss L Matching Networks Pi Matching Networks Impedance Calculations...
- Tags: Apple Macintosh, Calculation, Antenna, Black Cat Systems, Desktops, Hardware
- Software downloads 2008-12-22
- A Novel Wire Antenna for GPS and WLAN Co-Design
- A high performance dual band monopole antenna fabricated using single folded wires as radiator is presented. A prototype of the proposed monopole antenna with a compact area size of 6mm×6mm×10mm is implemented, and the antenna shows a wide operating dual bandwidth (referenced VSWR=3) of about 295MHz and 343MHz for low...
- Tags: WLAN, Antenna, GPS, PDAs, Handhelds, Wi-Fi, Wireless And Mobility, Consumer Electronics, Personal Technology, Hardware
- White papers 2008-07-25
- Antennas and Propagation in UHF RFID Systems
- This paper discusses antennas and propagation aspects in current passive UHF RFID systems. The paper considers a "Reader-tag-reader" link and concentrates on each part of it: reader antennas, propagation channel, and tags. The paper includes channel modeling equations and support the discussion with experimental measurements of tag performance in various...
- Tags: Intermec Technologies Corp., Modeling, Antenna, Research & Development, Business Operations
- White papers 2008-04-17
- Dual-Band Dipole Antenna for RFID Tag Applications
- New design of a dipole antenna with rectangular fractal shape radiator element with two operating bands for Radio Frequency Identification RFID is presented. By using fractal shape slot and metal meander patch, the proposed antenna has the wide and dual measured return loss bandwidth. Besides, the omnidirectional radiation pattern of...
- Tags: Antenna, RFID Tag, RFID, Wireless And Mobility, Security, Biometrics
- White papers 2008-10-01
- Patch Antenna Based on Metamaterials for a RFID Transponder
- In this paper a self-diplexed antenna is proposed for a RFID transponder application. The development cycle is divided into two stages: antenna design and filters design. The antenna is based on a square microstrip patch filled with metamaterial structures. The inclusion of these structures allows simultaneous operation over several frequencies,...
- Tags: Antenna, RFID, Wireless And Mobility, Security, Biometrics
- White papers 2008-06-01
- A Novel Planar Microstrip Antenna Design for UHF RFID
- Passive UHF RFID tags generally do not work well near metal or water. Microstrip antennas offer a potential solution, but suffer from manufacturing complexity because a need for via or some other reference to ground. This paper presents a new antenna and matching circuit design using a balanced feed that...
- Tags: Antenna, University Of Kansas, Manufacturing
- White papers 2007-02-22
- Adaptive Antenna Array for IEEE802.16e Base Station in the Presence of Multipath and Interference and Considering Mutual Coupling Effects
- In this paper, an adaptive antenna array beamformer for the Base Station of Mobile WiMAX (IEEE802.16e) is designed. This antenna is considered for uplink beamforming in presence of interferer signals and noisy multipath channel. Complex excitation coefficients of the array elements are controlled adaptively to track the mobile user signal...
- Tags: Mobile, Antenna, Element Pattern, WiMAX, Advertising & Promotion, Wi-Fi, Wireless And Mobility, Marketing
- White papers 2008-04-08
- WiMAX System Performance in Highly Mobile Scenarios With Directional Antennas
- This paper presents a performance evaluation of a WiMAX system (802.16-2004) employing directional antennas in highly mobile applications. A WiMAX physical layer simulator is used together with an appropriate mobile channel model to perform the analysis. Results show that mobile performance is significantly improved when directional antennas are utilised at...
- Tags: Performance, Mobile, Antenna, WiMAX Physical Layer Simulator, WiMAX, Performance Management, Advertising & Promotion, Wi-Fi, Wireless And Mobility, Human Resources, Workforce Management, Marketing
- White papers 2007-11-27
- Bluetooth Wireless Networking
- Bluetooth technology offers three different types of defined ranges, based on output ranges. Class 1 devices are the most powerful, as they can have up to 100 mW of power, with a regular antenna giving them a range of around 130 - 330 feet. The class 2 devices are lower...
- Tags: mW, Antenna, Class 1 Device, Bluetooth, Wi-Fi, Wireless
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