AWR Corporation
This application note gives details how to complement Microwave Office® circuit design software with National Instrument’s Multisim circuit simulation software and Ultiboard printed circuit board (PCB) layout software for a comprehensive design flow spanning from DC to microwave frequencies.
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AWR Corporation
This White Paper examines the complete flow and details the design of several critical design elements for this device, which integrates many RF components on a single printed circuit board (PCB). Design challenges include coupling issues between the RX and TX paths, as well as numerous distributed elements that required EM simulator-based tuning for optimal performance.
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AWR Corporation
Next generation high power, high bandwidth electronic devices rely on well-designed RF/microwave components for peak performance. In the specialized world of RF and microwave engineering, the design and development of power ampli?ers (PAs) is a specialty within a specialty that requires many years of focused engineering experience and a suitable collection of test and measurement (T&M) equipment. And, while expertise and T&M equipment will always be necessary for PA design, in today’s competitive marketplace, it is becoming essential to also use a combination of specialized and general design automation software tools to cut design cycles and maximize performance in order to bring the best products to market ?rst.
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AWR Corporation
Automated synthesis of microwave devices has been gaining in popularity in CAE applications over the past decade. Antenna Magus now brings this capability to the ?eld of antenna design. Antenna Magus provides a structured catalog of antennas (monitor image below) with concise documentation, robust design algorithms, and export models. The documentation is researched, structured, referenced, and maintained to ensure that documentation on each antenna is well suited to the task at hand. The design algorithms produce working parameter sets based on user-de?ned objectives almost instantly.
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AWR Corporation
Understanding and correctly predicting cellular, radar, or satellite RF link performance early in the design cycle has become a key element in product success. The requirements of today’s complex, high performance wireless devices are driving designers to assess critical measurements long before manufacturing begins. A new white paper from AWR, “Understanding and Correctly Predicting Critical Metrics for Wireless RF Links,” highlights the advantages of using Visual System Simulator™ (VSS) RF system simulation software for detailed insight into the full performance of an RF link in next- generation wireless products.
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Aeroflex - Inmet
This application note covers the recommended mounting techniques for the proper conduction cooling and RF performance of a surface mounted (flangeless) chip attenuator, termination or resistor. It also covers the issues that should be taken into account when mounting high power flange devices.
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Aeroflex - Inmet
Thin substrate chip resistive terminations have a small capacitance to ground in parallel with the 50 ohm resistor. This Application note goes over matching techniques for thin substrate chip resistive terminations.
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Aeroflex - Inmet
This application note from Aeroflex/Inmet examines the major resistor systems for microwave devices and discusses their relative advantages and disadvantages.
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Aeroflex - Inmet
This Application note from Aeroflex/Inmet discusses how much power a microwave device can handle before it overheats. It goes over a good approximation of the technique for determining "hot spots" of different structures.
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TRM Microwave
Directional Couplers are used to provide a simple, convenient, accurate means for sampling and monitoring incident and reflected power, as sampling devices in control loops and in a wide variety of signal processing applications.
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TRM Microwave
By definition, a hybrid is a four-port directional coupler with a -3 dB coupling coefficient. It is theoretically matched at all four ports and has two ports where pair members are isolated from each other.
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RF Industries
This white paper discusses the steps necessary to correct for insertion phase error as part of the calibration procedure for Vector Network Analyzers.
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RF Industries
The necessity of White Bronze plating for use on RF connectors gained popularity in the early 1990’s as cellular telephone communications and networks were taking form (History of White Bronze). White bronze is actually not bronze, but an alloy of varying amounts of copper, tin and zinc. It is commonly used in jewelry as a substitute for nickel.
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RF Industries
Intermodulation distortion or IMD has always existed in RF transmission paths. Until about the early 1990’s, cellular communications had relatively low power carrier levels. Intermodulation distortion in passive devices was not necessarily a problem because the distortion levels were significantly below the noise floor of the broadcast system. The mobile communication industry grew rapidly and the need for greater channel capacity meant higher broadcast powers at base stations. Typical RF connectors such as the N connector satisfied the earlier demands but as the sensitivity of the receivers increased, a condition within RF connectors was exposed.
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RF Industries
RF/microwave connectors are small and often overlooked, but they serve as gateways for many electronic devices and systems, linking components and systems together to enable proper operation. Coaxial connectors are often taken for granted—until they fail. They are instrumental to the operation of many electronic devices and systems, from cellular telephones and wireless data networks to the most advanced radar and electronic-warfare (EW) systems. Whether designing or simply maintaining electronic devices and systems, understanding the role of the RF/microwave connector can help to boost both performance and reliability.
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