By Joe Cozzarelli, ANADIGICS As mobile carriers and network operators transition to 4G service, they are faced with several challenges, including the massive amount of smartphones available in the market, the volume of data traffic per phone that is rising exponentially, and all the steps required to deploy and upgrade their network infrastructures.
In the operating environment seen by electronics today there are numerous sources of electromagnetic interference (EMI) and radio frequency interference (RFI). This is due in large part to the increased use of RF technology. These types of interference result in the need for common mode filtering in applications utilizing differential interfaces.
Silicon Laboratories Inc. recently introduced an EZRadio® wireless IC solution designed to reduce the cost and complexity of one-way wireless links used in a wide range of consumer, industrial and automotive systems. The new Si4010 system-on-chip (SoC) RF transmitter enables developers to optimize remote keyless entry (RKE), garage door opener, remote control, building automation and security device designs for the lowest system cost and highest performance while ensuring one-way link integrity.
Wireless systems are now fully mainstream in our lives, not only in the consumer world of cell phones, Wi-Fi enabled laptops and satellite television, but also in the mission and life critical world of aerospace and defense. Recent applications such as ADS-B (Automatic Dependant Surveillance - Broadcast) managed commercial airline flight, software defined radios, and UAVs (unmanned aerial vehicles) bristling with sensors, all depend heavily on the electromagnetic spectrum to interact with the world, demand the highest in reliability, and are driving new and innovative solutions relative to electrical interconnect.
After three years of deliberation, the IEEE802.16m air interface definition will be ready for prime time in the next few months. This critical step toward creating true 4G cellular technology based on WiMAX is important enough to earn compliant products a new name: WiMAX 2. Further proof came last month, when an impressive subset of the WiMAX community created the WiMAX 2 Collaboration Initiative to "improve the economics of mobile broadband" and "to create a better value chain for service providers.
Freescale Semiconductor has introduced its MSC8155 digital signal processor (DSP), a higher performance and cost-optimized version of the company's flagship MSC8156 DSP based on the latest StarCore technology. The MSC8155 includes next-generation acceleration and interconnect technologies that boost overall chip performance and further enhance the capabilities of broadband wireless base station equipment.
Now available from Mimix Broadband, Inc. is a 5.6 to 10.5 GHz GaAs MMIC up-converter that integrates a double balanced image reject mixer, LO buffer amplifier, RF buffer amplifier and variable attenuator, all within a fully molded 4x4mm QFN package. This RoHS-compliant, packaged up-converter has an output third order intercept point (OIP3) of +25 dBm, a conversion gain of 8 dB and a typical image rejection of 15 dBc.LISTED UNDER: Semiconductors, MMIC
CDMA power amplifier FO Anadigics, Inc. has released the latest version of its highly successful dual-band CDMA power amplifiers (PAs) the AWC6323 designed for today's most advanced CDMA handsets and data cards for the world's leading wireless providers. For the first time, high performance directional couplers have been integrated into a dual band CDMA PA in the 3 X 5 X 1 (mm) footprint.
The new LDU50-CW (RES-INGENIUM) is a 500 to 1000 MHz Class AB pallet amplifier designed for heavy duty operation in military and law-enforcement jamming applications (50W, CW). This rugged RoHS-compliant amplifier features two Freescale MRF9030LR1 power transistors (LDMOS), achieves 15 dB gain, maintains impressive gain-flatness of +/-0.
By Keith Adkins and Jackie Johnson, RF Micro Devices In the last decade mobile device users have seen unprecedented changes in technology. These changes have brought more functionality and lower cost to the overall handset market. Users are demanding more and more functionality in mobile devices, which comes at the cost of talk time.
By Josh Carnes, National Semiconductor Corporation click to enlarge Figure 1. Block diagram of an IF sampling subsystem within a communications receiver. Cutting-edge 16-bit, high-speed analog-to-digital converters (ADC) can offer the very high dynamic range and low distortion levels required to meet today's most demanding wireless communications standards.
National Semiconductor Corporation has released the first three products in its SIMPLE SWITCHER® power module family. The LMZ-series of power modules provide an innovative, integrated solution that will save design time and provide ease-of-use to help system designers get their products to market faster.
Making measurements involving MIMO applications requires adaptation of the algorithms used in the analysis software. By Johan Nilsson and Dr. Wolfgang Wendler, Rohde & Schwarz click to enlarge Figure 1. MIMO in WiMAX system. Due to ongoing growth in demand for channel capacity, more and more radio standards such as WiMAX, 3GPP HSPA, 3GPP LTE and WLAN are adopting MIMO technology.
ASSPs are meeting the challenges through the integration of mixed-signal technology and innovative power management schemes. Herve Branquart, Robert Waterman, ON Semiconductor click to enlarge Figure 1: Two way RKE block diagram Wireless transceiver technology is truly established in the automotive industry with Remote Keyless Entry (RKE) now a standard feature of even basic specification vehicles.
M/A-Com Technology Solutions showcased a new family of surface mount broadband 2 to 20 GHz HMICTM PIN diode switches for Test Instrumentation, Satellite and other wide frequency range applications at the 2009 Institute of Electrical and Electronics Engineers (IEEE) Microwave Theory & Techniques Symposium (MTT-S) show last week.