Barney Robison Blog

Anritsu Company produce Bluetooth allow Bluetooth designer and manufacturer of products deal with that prove 4.0 according to Bluetooth core that adopt recently Low energy chosen in radio test on storey that is tested. Because choose, the engineer can use and begin to finish including a test of Bluetooth basic rate answer the questions in a test paper, raise the transmission speed of the data (EDR) MT8852B test and low energy measurement in

New Bluetooth low energy measurement choose, test 6 low energy example increase, reach sure basic MT8852B test. These test newly the example can be as simplifying the creation planned in examination and reducing the part to test an examination manuscript of time to run.

Bluetooth low energy measurement carried out directly in using MT8852B of apparatus that definite HCI or control order of two electric wires controls in the test. As Read more

Simulation apparatus Limited Company Regulate the continuous wave (FMCW) ,Release one new PLL synthesizer make flexibility and implementation to save cost of frequency become possible radar systems already.

FMCW radar system is in the car, used in Aero-Space to a great extent, military, industry and want remote measurement those about distance and external dissemination applied, spent of target of pace. FMCW radar system can hand over and perceive, compared with traditional radar beating is close to offering an important expense advantage in much lower level range of power.

FMCW radar system needs relying on the voltage-controlled oscillator (VCO) Linear high radio performance and the current one method, because of complexity of them, no adaptability and high expenses cause a lot of designs to challenge. PLL synthesizer, the newest increase of the family of ADI of ADF4158, make 6.1 GHz with and can easy to take shape into suitable designer of FMCW radar Read more

is a term that refers to alternating current (AC) havingcharacteristics such that, if the current is input to an antenna, an electromagnetic (EM) field is generated suitable for wireless broadcastingand/or communications. These frequencies cover asignificant portion of the electromagnetic radiation spectrum, extending from nine kilohertz (9 kHz),the lowest allocated wireless communications frequency (it’s within the range of human hearing), to thousands of gigahertz(GHz).

When an RF current is supplied to an antenna, itgives rise to an electromagneticfield that propagates through space. This field is sometimescalled an RF field; in less technical jargon it is a “radiowave.” Any RF field has a wavelength that is inverselyproportional to the frequency. In the atmosphere or in outerspace, if f is the frequency in megahertz and sis the wavelength in meters, then

s = 300/f

The frequencyof an RF signal is inversely proportional to the wavelengthof Read more

Single-stream 802.11n is a slimmed-down version of the 802.11n wireless local area network (WLAN) specification.
The goal of single-stream 802.11n is to improve the quality of service on mobile devices by taking advantage of 802.11n’s wider radio frequency channel and mechanism for decreasing time between transmissions. Single-stream 802.11n takes advantage of the fact that the second draft of the 802.11n specification does not require the number of antennas on the sending station to be equal to the number on the receiving station. Read more

Push Voice is a service that enables functionality normally associated with PBX-based phone systems for cellular phones or other mobile handsets. This capacity helps to integrate mobile handsets with corporate communications systems.
Added functions may include:

call monitoring
multiple voice mail message types and handling
speed dialing, possibly with access to a shared, organizational phone directory
call flows
conferencing
rich voice mail communications
unified communications, enabling (for example) voice capability for email
direct dial into corporate call centers
tracking for cost monitoring, audit and compliance records
immediate use of company extensions and phone numbers
use of leased lines and negotiated calling rates.

According to Jack Gold, founder of J.Gold Associates, a Northborough, Mass.-based research and advisory firm, roughly 75% of enterprise workers are mobile at least 25% of the Read more

Optical wireless refers to the combined use of two technologies – conventional radio-frequency (RF) wireless and optical fiber – for telecommunication. Long-range links are provided by optical fiber (also known as fiber optic cables), and links from the long-range end-points to end users are accomplished by RF wireless. Sometimes the local links are provided by laser systems, also known as free-space optics (FSO), rather than by RF wireless.
A major problem facing the developers of fiber optic communications systems is the fact that it is expensive to provide each end user with a separate fiber optic line. While this has been done for large corporations in a few geographic regions, the fiber-to-the-home ideal remains impractical. But RF wireless at ultra-high frequencies (UHF) and microwave frequencies can carry broadband signals to individual computers at substantial data speeds, and the cost is reasonable.

A typical optical wireless system would bring Read more

What is PEAP? PEAP (Protected Extensible Authentication Protocol) is a version of EAP, the authentication protocol used in wireless networks and Point-to-Point connections. PEAP is designed to provide more secure authentication for 802.11 WLANs (wireless local area networks) that support 802.1X port access control.
PEAP authenticates the server with a public key certificate and carries the authentication in a secure Transport Layer Security (TLS) session, over which the WLAN user, WLAN stations and the authentication server can authenticate themselves. Each station gets an individual encryption key. When used in conjunction with Temporal Key Integrity Protocol (TKIP), each key has a finite lifetime.

Cisco Systems, Microsoft and RSA Security are promoting PEAP as an Internet standard. Currently in draft status, the protocol is gaining support and is expected to displace Cisco’s proprietary Lightweight Extensible Authentication Protocol (LEAP).

PEAP Read more

A patch antenna is a wafer-like directional antenna suitable for covering single-floor small offices, small stores and other indoor locations where access points cannot be placed centrally. Patch antennas produce hemispherical coverage, spreading away from the mount point at a width of 30 to 180 degrees.

Patch antennas are also known as panel, flat panel or microstrip antennas. They are formed by overlaying two metallic plates, one larger than the other, with a dielectric sheet in the middle. This type of antenna is usually encased in white or black plastic, not only to protect the antenna, but also to make it easy to mount. Because they are flat, thin and lightweight, patch antennas are often hung on walls or ceilings where they remain visually unobtrusive and blend easily into the background. Read more

The One Laptop Per Child project (OLPC) is an initiative aimed at providing inexpensive laptop computers to children in the developing world as a means of bridging the digital divide. OLPC was founded by Nicholas Negroponte, also founder of MIT Media Lab. The initiative was announced at the World Economic Forum in Davos, Switzerland in January 2005. The project group released XO, a beta version of the laptop, in February 2007. Initially, one million of the devices were rolled out to several countries.
From the OLPC mission statement:

“OLPC is not, at heart, a technology program, nor is the XO a product in any conventional sense of the word. OLPC is a non-profit organization providing a means to an end—an end that sees children in even the most remote regions of the globe being given the opportunity to tap into their own potential, to be exposed to a whole world of ideas, and to contribute to a more productive and saner world community.” Read more