# Industry News

## V14 of NI AWR Design Environment Software Platform Now Released

Microwave Journal Magazine -

V14 of the NI AWR Design Environment platform has been released and is available to download for current customers and evaluators.

## Pasternack Introduces SPDT PIN Diode RF Switches from 20 MHz to 2700 MHz

News from Everything RF -

Pasternack has unveiled a new line of SPDT high-power PIN diode RF switches that offer desirable performance for transmit and receive signal routing applications. Typical applications can involve u..

## Quantenna Demonstrates 1 Gbps Throughput Using its Wi-Fi Access Point

News from Everything RF -

Quantenna Communications has demonstrated delivery of 1 Gbps throughput using its QSR10GU-AX PLUSsolution andQSR10G Wi-Fi chipset, each independently communicating with commercially available mobil..

## Southwest Microwave Appoints Michelle Roe as President

News from Everything RF -

Southwest Microwave has announced the appointment of Michelle Roe as President. Roe succeeds Richard McCormick, who has transitioned to Chairman and CEO. In her new role, Roe will oversee internati..

## US Senate Bill on Small Cell Infrastructure Questioned for Limiting Power of Local Administrations

News from Everything RF -

The US National Institute for Science, Law and Public Policy (NISLAPP) has now called on the US Congress to reconsider the terms of its Senate Bill S.1357 (STREAMLINE Small Cell Deployment Act). Th..

## Advantech Wireless Unveils C-band Low Noise Block Converter for Troposcatter Applications

News from Everything RF -

Advantech Wireless has released a newC-band Low Noise Block (LNB) for Advanced Tropospheric Scattering Transmission Applications.Tropospheric scattering is a method of communicating with microwave ..

## Wi-Fi Technology Can Now Check Your Bags for Suspicious Materials

News from Everything RF -

Researchers at Rutgers University–New Brunswick have claimed regular Wi-Fi technology can be used to detect hazardous materials in bags at public places. The team has published a paper statin..

## GNSS Receiver with Post Processing to Provide Accurate, Affordable Geo-Location for Drones

News from Everything RF -

An accurate GNSS receiver is a must for all UAV models. An unmanned system without a proper geolocation solution simply cannot be employed for drone applications for which the final outcome needs t..

## Quantenna Enables Individual Mobile Wi-Fi Client to Exceed 1 Gbps Throughput

Microwave Journal Magazine -

Quantenna Communications Inc. announced the successful delivery of over 1 Gbps throughput, demonstrated using Quantenna QSR10GU-AX PLUS and QSR10G, each independently communicating with commercially available mobile products.

## Coaxial Cable Loss due to Loss Tangent

Pasternack Blog -

Electrical losses in a coaxial cable create heat in the outer and center conductors and are the two main types of coaxial cable loss, skin-effect loss and dielectric loss, respectively. This heat, or loss, can be calculated with the understanding of the following concepts.

What is Skin Effect Loss?

In coaxial cable, skin effect is the movement of an alternating electric current (AC) whereby the current density is greater near the surface of the conductor and lessens within the conductor.  Skin effect is the decline in current density and the skin depth is a measure of the depth at which the current density falls to 1/e of its value near the surface. Over 98 percent of the current flows within a layer 4 times the skin depth from the surface. At high frequencies, the skin depth becomes much smaller. Skin effect loss usually occurs at high frequencies when the signal reaches and moves along the surface of the inner conductor, which causes additional RF losses at higher frequencies.

A skin depth calculator can be found here.

Resistance per unit length is the ratio of specific resistance or resistivity to the area of cross-section of given conductor in Ohm per meter. With skin-effect loss, the resistance per unit length, Rl, and the inductance per unit length, Ll, increase with the square root of the frequency.

Skin effect losses are resistive, caused by the narrowing of the conduction path. In calculating loss, loss per unit length includes the skin effect loss and dielectric loss.

What is Dielectric Loss?

Dielectric conduction loss is caused when the insulating material inside the transmission line absorbs energy from the electromagnetic field developed between the inner and outer conductors. Dielectric loss explains the amount of dissipation of electromagnetic energy or heat of a dielectric material. It is often described in terms of either the loss angle δ or the corresponding loss tangent tan δ. Both refer to the phasor in the complex plane whose real and imaginary parts are the resistive (lossy) component of an electromagnetic field and its reactive (lossless) counterpart. The ratio of two quantities is defined in term of Tan.

What is Loss Tangent?

Loss tangent is the ratio at any specified frequency between the real and imaginary parts of the impedance of the capacitor. A large loss tangent refers to a high degree of dielectric absorption. Loss tangent is the ratio between the imaginary and real parts of the complex permittivity where the permittivity of dielectric is given by:

ε =ε_re − jε_im

When this formula is drawn on an x-y plane, the tangent of the angle between the real and the imaginary quantity is discoverable which can be described as:

tanδ = ε_im/ε_re

Which means the ratio of the imaginary part to the real part of the permittivity is found to be another quantity, i.e. the loss tangent, which is used to express the losses in a dielectric material. In other words, it is the ratio of the imaginary part to the real part or the tangent of the angle between the complex number and the real axis.  This angle is the loss angle and the tangent is called the loss tangent.  Thus, the value of the loss tangent describes how lossy a material is, such that it either represents a very lossy material or a very good conductor.

Measurement of loss using sinusoidal excitation at a particular frequency yields the product of skin effect and dielectric loss functions or the sum of the skin effect and dielectric losses in units of dB. Once the skin-effect loss is derived, the portion of loss attributable to dielectric losses may be estimable.

The post Coaxial Cable Loss due to Loss Tangent appeared first on Pasternack Blog.

## Latest Version (v14) of NI AWR Design Environment Software is Out Now

News from Everything RF -

NI AWR has introduced a new version of theNI AWR Design Environment platform. Thelatest release -V14-includesnew features, add-on modules and enhancements to the NI AWR Design Environment software ..

## Infineon Invests in Metawave to Develop Innovative Automotive Radar Technologies

News from Everything RF -

Infineon Technologiesannounced that they werepart ofMetawave Corporation’srecent financing round.Metawave is building wireless technology platforms using engineered metamaterials and Artifici..

## Semtech LoRa Technology Enables Real-Time Cattle Health Monitoring

News from Everything RF -

Quantified Ag, a company specializing in IoT cattle tracking and cattle health solutions, has implemented Semtech’sLoRa devices and Technologyinto its smart cattle tags for advanced health mo..

## Keysight Technologies Acquires Thales Calibration Services in Australia

News from Everything RF -

Keysight has acquired Thales Calibration Services in Melbourne Australia, a subsidiary of Thales Group, effective July 2, 2018. This acquisition establishes Keysight as the largest calibration and ..

## Samsung Launches First 5G Modem Fully Compliant with 3GPP Standards

News from Everything RF -

Samsung Electronics has developed the first 5G modem that is fully compatible with 3GPP Release 15, the most up-to-date standard specification for 5G New Radio (5G-NR). The Exynos Modem 5100is buil..

## PowerSphyr and GaN Systems to Develop GaN-Based Wireless Power Systems for High Power Applications

News from Everything RF -

PowerSphyr and GaN Systems have entered into a strategic agreement to bring state-of-the-art GaN-based wireless power systems to market for high powered applications across consumer, industrial, an..

## World’s First Monolithic, SOI Wi-Fi Front-end Module for 2.4 GHz Applications

News from Everything RF -

pSemi has introduced the first monolithic, silicon-on-insulator (SOI) Wi-Fi front-end module (FEM). The PE561221is ideal for Wi-Fi home gateways, routers and set-top boxes, this high-performance mo..

## Demand for SiC and GaN Propels Wolfspeed’s Growth

Microwave Journal Magazine -

Reflecting strong demand for SiC and GaN, Wolfspeed’s fourth fiscal quarter (Q4) revenue grew 34 percent sequentially and 81 percent year-over-year (Y/Y) to $110 million. For the full fiscal year, Wolfspeed’s revenue was$329 million, 49 percent above the revenue achieved in fiscal 2017.

## NASA Explores the Use of GaN Crystals for Space Applications

News from Everything RF -

Gallium Nitride (GaN) due to its high efficiency and excellent electric characteristics is being considered for use in spaceapplications.NASA researchers are currently examining the use of gallium ..

## UCSD Researchers Develop Multi-Purpose Stretchable Electronics

News from Everything RF -

A team of researchers have developed a method to build soft, pliable, 3D stretchable electronics, that can pack a lot of functions while staying thin and small in size. The team achieved this by st..