Downloads http://www.wirelessdesignonline.com/ Tue, 09 Mar 2010 14:05:00 GMT Differential signaling is the primary choice for a low power RF interconnection because it provides superior immunity to noise by offering twice the signal swing for a given supply voltage. The out of phase property of a balanced pair has several other benefits: it rejects any common mode interference signal, cancels the even order distortions such IM2, and reduces Electromagnetic Interference (EMI), EMI emission, and susceptibility. However, this presents a challenge for RF designers to integrate differential devices together since the widely used S-parameter matching technique cannot simply be applied. This article depicts a simple generic technique to match differential impedance devices and gives some matching circuit examples. http://www.wirelessdesignonline.com/download.mvc/Matching-Differential-Port-Devices-0001?atc~c=771+s=774+r=001+l=a Tue, 09 Mar 2010 14:05:00 GMT The use of tables for designing impedance matching filters for real loads is well known. Simple complex loads can often be matched by this technique by incorporating the imaginary portion of the load into the first filter element. This technique is rarely useful for matching diodes because the equivalent circuit for the diode must include several real and imaginary elements. A methodical technique for matching such complex loads to a transmission line will be described. Previous references to similar procedures were empirical in nature. No tables are used, but it is necessary to know the admittance of the diode in the frequency band of interest. http://www.wirelessdesignonline.com/download.mvc/Impedance-Matching-Techniques-For-Mixers-And-0001?atc~c=771+s=774+r=001+l=a Fri, 05 Mar 2010 19:37:00 GMT Since being ratified in 2003, the wireless communications standard IEEE 802.15.4 has enjoyed a steadily increasing uptake rate. New and inventive industrial, medical, security and other specialized applications continue to be regularly introduced, employing either open or proprietary protocols riding atop the lower level network layers prescribed by the standard. With mature tools, cost reduced silicon and significant design momentum behind the standard, 802.15.4 enabled products are now set to flood the consumer market space. ZigBee RF4CE is the primary protocol that will power this next wave of deployment. http://www.wirelessdesignonline.com/download.mvc/Practical-Antenna-Choices-For-802154-Enabled-0001?atc~c=771+s=774+r=001+l=a Fri, 05 Mar 2010 19:17:00 GMT Narda, an L-3 Communications company, recently introduced the Model SP133DHS SP3T reflective switch that operates from 2 to 18 GHz and provides fast switching speed, high isolation, low insertion loss, and is housed in a rugged compact package. http://www.wirelessdesignonline.com/download.mvc/SP3T-Reflective-Switch-With-Fast-Switching-Sp-0001?atc~c=771+s=774+r=001+l=a Wed, 03 Mar 2010 18:14:00 GMT Switching is probably the most overlooked and undervalued part of a test system design. Great attention is spent selecting the measurement and stimulus instruments. But more often than not, the signal switching solution does not complement the instruments. It doesn't matter how accurate the instruments are if the signals pass through a poor switch to get to them. Engineers are familiar with test instruments because they have used them during their school years and at work in the lab and on the bench testing products or debugging new designs. So it's easy for them to select instruments for an automated test system. On the other hand, the engineers probably did not use switching in day-to-day testing and only consider switching a minor component in an automated test system. http://www.wirelessdesignonline.com/download.mvc/Understanding-Star-Switching-The-Star-Of-The-0001?atc~c=771+s=774+r=001+l=a Wed, 03 Mar 2010 16:41:00 GMT No cellular mobile communication technology attracts as much wireless industry attention these days as Long Term Evolution, better known as LTE. Considered by many to be the heir apparent to the mobile broadband throne, LTE holds a great deal of promise. So what's the current state of LTE technology? How big is LTE's upside, really? What hurdles - technical or otherwise - must LTE still overcome to seize the coveted 4G mantle? To determine the answers to these and other key LTE-related questions, RF Globalnet queried four industry experts with vested interest in LTE technology: Jan Whitacre of Agilent Technologies, Mike Barrick of Anritsu Corporation, Mike Press of RFMD, and Andreas Roessler of Rohde & Schwarz. Their responses provide a comprehensive picture of LTE's past, present, and future. http://www.wirelessdesignonline.com/download.mvc/Article-7-Critical-LTE-Questions-Answered-0001?atc~c=771+s=774+r=001+l=a Mon, 01 Mar 2010 17:51:00 GMT This Application Note describes the HSDPA and HSUPA uplink channel structure. Challenges for UE power amplifier design are outlined, and guidelines how to use R&S measurement equipment for testing UE power amplifiers are provided. http://www.wirelessdesignonline.com/download.mvc/High-Speed-Downlink-Packet-Access-HSDPA-Chall-0002?atc~c=771+s=774+r=001+l=a Mon, 01 May 2006 15:10:00 GMT Skyworks SKY77607 is a hybrid multimode, multiband Power Amplifier Module (PAM) that supports 2.5G and 3G handsets, and operates efficiently in GSM, EGPRS, EDGE and WCDMA modes. http://www.wirelessdesignonline.com/download.mvc/SKY77607-Multiband-Multimode-Power-Amplifier-0001?atc~c=771+s=774+r=001+l=a Mon, 22 Feb 2010 10:43:00 GMT Skyworks SKY77605 is a hybrid multimode, multiband Power Amplifier Module (PAM) that supports 2.5G and 3G handsets, and operates efficiently in GSM, EGPRS, EDGE and WCDMA modes. http://www.wirelessdesignonline.com/download.mvc/SKY77605-Multiband-Multimode-Power-Amplifier-0001?atc~c=771+s=774+r=001+l=a Mon, 22 Feb 2010 10:38:00 GMT Skyworks SKY77604 is a hybrid multi-mode, multi-band Power Amplifier Module (PAM) that supports 2.5G and 3G handsets, and operates efficiently in GSM, EGPRS, EDGE WCDMA modes. http://www.wirelessdesignonline.com/download.mvc/SKY77604-Multi-Mode-Multi-Band-Power-0001?atc~c=771+s=774+r=001+l=a Mon, 22 Feb 2010 10:33:00 GMT The SKY77602 Power Amplifier Module (PAM) is a fully matched, 22-pad, surface mount module developed for Wideband Code Division Multiple Access (WCDMA) and CDMA2000 applications. http://www.wirelessdesignonline.com/download.mvc/SKY77602-Multi-Band-Multi-Mode-3G-Power-0001?atc~c=771+s=774+r=001+l=a Mon, 22 Feb 2010 10:29:00 GMT Skyworks SKY77601 is a hybrid multi-mode, multi-band Power Amplifier Module (PAM). The device is intended to support 2.5G and 3G handsets and operates efficiently in GSM, EGPRS, EDGE WCDMA modes. http://www.wirelessdesignonline.com/download.mvc/SKY77601-Multi-Mode-Multi-Band-Power-0001?atc~c=771+s=774+r=001+l=a Mon, 22 Feb 2010 10:17:00 GMT Narda, an L-3 Communications company, recently introduced the Model SS153DHS SP5T reflective PIN-diode switch that operates from DC to 18 GHz and provides fast switching speed, high isolation, low insertion loss, and is housed in a rugged compact package. Together these features make the switch an excellent choice for applications ranging from electronic warfare systems and simulators to automated test equipment. http://www.wirelessdesignonline.com/download.mvc/18-GHz-SP5T-PIN-Diode-Switch-0001?atc~c=771+s=774+r=001+l=a Wed, 10 Feb 2010 05:50:00 GMT As GPS technology becomes more common, GPS receiver manufacturers, OEM integrators, and contract manufacturers struggle to determine the appropriate standard tests to verify GPS receiver performance. Verification procedures require a controlled environment that facilitates precise repeatability. In most cases, using actual GPS satellite signals received through an antenna does not provide such an environment. This article describes the typical GPS receiver tests used today for GPS receiver verification. It also introduces a real-time GPS signal simulation application and platform capable of generating the required GPS signals for a repeatable and flexible test environment. http://www.wirelessdesignonline.com/download.mvc/GPS-Receiver-Testing-0003?atc~c=771+s=774+r=001+l=a Tue, 09 Feb 2010 21:02:00 GMT This article is part of a series of quarterly guest columns by Rick Cory, Applications Engineering Manager, Skyworks Solutions, Inc. In this installment, Cory discusses the recent not-so-subtle shift in RF circuit design, with the field now being divided into two subspecialties: system integrator and RF component designer. He then explores the need for RF applications engineers to fill in the gap between these two camps. http://www.wirelessdesignonline.com/download.mvc/Guest-Column-Is-There-A-Shortage-Of-Good-RF-A-0001?atc~c=771+s=774+r=001+l=a Tue, 09 Feb 2010 12:54:00 GMT Skyworks Solutions, Inc. is an innovator of high reliability analog and mixed signal semiconductors. Leveraging core technologies, Skyworks offers diverse standard and custom linear products supporting automotive, broadband, cellular infrastructure, energy management, industrial, medical, military and mobile handset applications. The Company's portfolio includes amplifiers, attenuators, detectors, diodes, directional couplers, front-end modules, hybrids, infrastructure RF subsystems, mixers / demodulators, phase shifters, PLLs / synthesizers / VCOs, power dividers / combiners, receivers, switches and technical ceramics. http://www.wirelessdesignonline.com/download.mvc/Solutions-Spotlight-0001?atc~c=771+s=774+r=001+l=a Mon, 08 Feb 2010 20:04:00 GMT The new 50P-1857 SMA, programmable attenuator, offers solid-state reliability and speed as well as superior broadband performance (200-6000 MHz). It has a dynamic range of 0-95dB in 1dB steps and is guaranteed monotonic across the band. TTL control and SMA female connectors are standard, but other control and connector configurations are also available. http://www.wirelessdesignonline.com/download.mvc/Spec-Sheet-50P-1605-SMA-Programmable-Attenuat-0001?atc~c=771+s=774+r=001+l=a Mon, 08 Feb 2010 18:04:00 GMT The new 50P-1857 SMA, programmable attenuator, offers solid-state reliability and speed as well as superior broadband performance (200-6000 MHz). It has a dynamic range of 0-95dB in 1dB steps and is guaranteed monotonic across the band. TTL control and SMA female connectors are standard, but other control and connector configurations are also available. http://www.wirelessdesignonline.com/download.mvc/Product-Drawing-50P-1605-SMA-Programmable-Att-0001?atc~c=771+s=774+r=001+l=a Mon, 08 Feb 2010 18:04:00 GMT The Model PM2003 is a three-channel, high performance power meter that features high speed measurement capability and wide dynamic range. http://www.wirelessdesignonline.com/download.mvc/10-kHz-To-40-GHz-Power-Meter-Model-PM2003-0001?atc~c=771+s=774+r=001+l=a Fri, 29 Jan 2010 19:49:00 GMT Skyworks Solutions offers a select group of diodes from our diverse diode offering in stock and ready for immediate design into your demanding applications. http://www.wirelessdesignonline.com/download.mvc/Product-Brief-Select-PIN-Schottky-And-Varacto-0001?atc~c=771+s=774+r=001+l=a Wed, 27 Jan 2010 20:45:00 GMT