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Industry News

Antenna Selection to Minimize Pointing Requirements

Use of antenna optimization to ensure antenna pointing requirements are kept to a minimum
Technical Feature Antenna Selection to Minimize Pointing Requirements Traditionally, when designing a satellite communications system, an allowance is made in the link budget for pointing loss. The earth station's antenna size is then selected to achieve the desired gain margin. In this article, a different approach called antenna optimization...
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Axial Ratio Measurements of Single Circularly Polarized Antennas

Presentation of a procedure for measuring the axial ratio of single circularly polarized antennas
Technical Feature Axial Ratio Measurements of Single Circularly Polarized Antennas Robert Gunnels Andrew Corp. Orland Park, IL The measurement of antenna axial ratios must be done properly if accurate results are to be obtained. When measuring on a terrestrial antenna test range, a straightforward approach is often used whereby...
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SOI CMOS Technology For RF System-on-chip Applications

Overview of current advances in silicon-on-insulator (SOI) CMOS technology, including reduction in cross-talk between RF and digital circuits and integration of high quality passive elements
Technical Feature SOI CMOS Technology For RF System-on-chip Applications CMOS technology is one of the most promising choices for RF applications. Its highly integrated nature provides true RF system-on-chip integration. Silicon-on- insulator (SOI) CMOS offers specific additional design advantages that include a significant reduction in cross-talk between RF and...
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Performing Transient Analysis on PLL Frequency Synthesizers

Use of system-level simulation tool with flexible behavorial modeling capability to simulate and enhance the performance of a wireless PLL circuit
Technical Feature Performing Transient Analysis on PLL Frequency Synthesizers A PLL can be considered a subsystem within a larger communications system, so it is appropriate to analyze this type of network with the help of a system-level simulator. The use of flexible behavioral models within the simulator allows only...
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A Feedforward Power Amplifier with Loops to Reduce RX Band Noise and Intermodulation Distortion

Introduction to a new power amplifier developed to reduce amplified noise and intermodulation distortion signals using a feedforward technique
Technical Feature A Feedforward Power Amplifier with Loops to Reduce RX Band Noise and Intermodulation Distortion This article proposes a new power amplifier approach for the reduction of amplified noise signals in the receiver (RX) band as well as intermodulation distortion signals in the transmitter (TX) band using a...
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A Large Bandwidth T-shaped Microstrip-fed Ground Plane Slot Antenna

Use of the finite difference time domain method to analyze the impedance of the T-shaped microstrip feedline structure
Technical Feature A Large Bandwidth T-shaped Microstrip-fed Ground Plane Slot Antenna The characteristics of a T-shaped microstrip feeding a ground plane slot antenna have been analyzed using the finite difference time domain (FDTD) method. The impedance and bandwidth of the proposed antenna depend highly on the design parameters. The...
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Topics in Communication System Design: Carrier Triple Beats

Analysis of carrier triple beats that create third-order intermodulation interference when two or more carriers are present in one channel
Technical Feature Topics in Communication System Design: Carrier Triple Beats Howard Hausman Miteq Inc. Hauppauge, NY Intermodulation interference is typically calculated based on two signals present in the RF or IF bandwidth. When the bandwidth is less than an octave, even-order intermodulation products, such as second- and fourth-order intermodulation...
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New Products

New Products COMPONENTS GaAs IC SP5T Switch The model AS195-306 GaAs IC SP5T switch features good harmonics and high IP3 in a compact package. The performance and size of the switch make it well suited for use as a transmit/ receive switch in GSM dual band handset applications. It...
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Around the Circuit

Around the Circuit INDUSTRY NEWS RF Micro Devices Inc. has agreed to acquire RF Nitro Communications Inc. Terms of the transaction were not disclosed. REMEC Inc. has signed a definitive agreement to acquire ADC Mersum Oy (Solitra) in Oulu, Finland, from ADC Telecommunications Inc. REMEC has agreed to purchase...
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New Literature

New Literature Products Brochure This new wireless and microwave products brochure includes electrical specifications and outline drawings of the company's new product releases. The new products include rotary step attenuators, micro-miniature and miniature fixed attenuators and a full line of high power terminations. Alan Industries Inc., Columbus, IN (800)...
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