RF & Microwave Industry News

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The trend for lightweight, low voltage battery operation in many of today’s consumer and communications equipment has driven the need for low voltage, high performance products for use in these systems. To meet these needs a new series of 5 × 7 mm surface-mount HCMOS crystal oscillators has been...

MMIC amplifiers that are efficient and deliver high power output over a very broad frequency range are extremely desirable in applications ranging from microwave instruments to electronic warfare systems. In addition to reducing the number of devices required to produce a desired RF power level, they consume less current...

Ask any engineer what is needed from an RF/microwave design tool and you will think you are stuck in a scene from Top Gun : “I feel the need for speed.” The thirst for greater simulation speed is never quenched, although model accuracy is just as important. Go across...

With the introduction of the MAAMGM0002, M/A-COM adds a cost-effective, highly manufacturable surface-mount plastic-packaged wideband driver amplifier to its array of standard products. The MAAMGM0002 provides 10 dB gain from 1 to 18 GHz, with a corresponding 4 dB typical noise figure and up to 21 dBm output power...

The design for the Vivaldi antenna is motivated by the need for a broadband measurement antenna for an antenna test range (ATR). The ATR is capable of a dual axis rotation to create 3-D plots and to calculate the total radiated power (TRP). 1 The TRP calculation involves the...

In the new millennium, the explosion of info-communication technologies has brought many new broadband design challenges. To meet these challenges, designers are required to fulfill more functionality per unit volume. In the first part of this article, the basic PBG configurations and application of PBG structures in enhancing the...

Low temperature co-fired ceramic (LTCC) is an increasingly popular technology that has the potential for increased reliability, improved electrical performance, size reduction and reduced cost. The LTCC process allows passive components such as resistors, inductors and capacitors to be embedded in a multilayer, integrated module with high density and...

The direct conversion, all digital gain control (DC-ADGC) radio receiver employs logarithmic amplifiers in the analog baseband to compress the signal dynamic range before the analog-to-digital converter. An antilog function may then be used in the digital baseband to decompress the signal. Two implementations of the DC-ADGC receiver are...

The direct transponding of RF signals onto optical fiber is an important element in the implementation of efficient radio-over-fiber systems. MQW lasers exhibit transfer functions from RF to light, which generally offer good linearity, but adequate dynamic range for applications in cellular and cordless systems requires further improvement in...

W-CDMA is one of the most important requirements of 3G mobile communication systems,1 and it presents a challenge to the design of RF systems for W-CDMA mobile terminals. Compared with a conventional superheterodyne structure, the direct RF I/Q modulation shows the advantages of a simple circuit configuration and low...