Whitepapers

Power Amplifier Savings with DC-DC Converters in GSM-GPRS-EDGE Mobile Handsets

This article is targeting on a technology of adjustable DC-DC converters, which can be implemented with GSM-GPRS-EDGE power amplifiers, as it is already widely used in CDMA/WCDMA handsets. Simulations show why this has not been used so far and how important the battery average consumption savings could be, with this low complexity technology used instead of a polar-loop architecture, which is under high effort recently in many companies.
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LDMOS Transistors in Power Microwave Applications

More than ten years ago LDMOS transistors were introduced as a replacement of bipolar transistors for RF power applications [1,2]. Nowadays LDMOS technology is the leading RF power technology for base station applications, in particular for GSM-EDGE applications at 1 and 2 GHz, WCDMA applications at 2.2 GHz and more recently for WiMax applications around 2.7 GHz and 3.8 GHz.
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Integer-N PLL Local Oscillator for Satellite Telecommand Receiver

This article describes the design and implementation of L-band frequency synthesizer based Local Oscillator to down-convert the uplink signal in a Telecommand Satellite Digital Receiver. An Integer-N PLL scheme was implemented to achieve a compact and low power module. The Local Oscillator when tested with the Receiver successfully achieved all performance parameters for satisfactory operation of the total system.
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PMTL™, A New High Speed Transmission Line Technology

In this paper we present the new patent pending transmission line technology, PMTL™ that promises to revolutionize PCB and CMOS interconnects as well as improving the fidelity of testing connectivity and parallelism across the spectrum. We will compare the electrical performance of the PMTL™ with other similar transmission lines such as microstrip, stripline, and CPW and show that it provides superior performance with best signal integrity. We will also provide some photographs of the samples to demonstrate some possible applications of the PMTL™ technology for uFlex cable, and buses, wideband wafer probes, universal test sockets and as a means for ATE tower top simplification and providing high fidelity testing connecting.
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Advances in High-Performance Ceramic Antennas for Small-Form-Factor, Multi-Technology Devices

Two trends are well underway in portable and handheld consumer electronic devices: shrinking form factors and the integration of multiple wireless technologies, such as Bluetooth™, cellular, GPS and Wi-Fi. These trends create challenges for device vendors and integrators by increasing the likelihood of RF noise and other system interactions that can undermine antenna performance.
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