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Broadband synthesizers based on direct digital synthesis (DDS) technology have traditionally led the industry in frequency agility and switching performance, but have also led in high NRE and recurring costs. These high costs stem from the custom nature of DDS-based synthesizers and have resulted in digital synthesizers being primarily...

Enhanced performance is needed from antennas, radomes and other microwave components to support ever-increasing functionality for military communications and electronic warfare (EW) applications. There is a continuing demand for antennas with broader bandwidth, higher power handling and better controlled radiation patterns, while at the same time reducing size and...

A number of factors are driving the design of high speed digital packaging. At the assembly level, metal boxes are the dominant configuration due to mounting and interconnect constraints. The next assembly connectivity is accomplished through cables, requiring coaxial connectors. Since a variety of companies manufacture many of the...

In recent years, GSM systems have been deployed using many base transceiver stations (BTS). However, in some areas, such as basements of buildings, tunnels and valleys, there may be no signal, and in some regions fading may occur. These problems can be solved cheaply by implementing repeaters. Figure 1...

When designing dielectric rod antennas for maximum bandwidth, maximum gain, minimum beamwidth and/or low side lobes, design parameters reported in the literature are provided in terms of free-space wavelength. While this methodology lends itself well to other antenna types, it is not as useful when used to describe dielectric...

Precise device characterization is the starting point of any good circuit design. This task can be particularly challenging when the device is a high power transistor having low input and output impedances. For devices working only under pulse conditions, specific test benches exist 1 but are rather complicated and...

As is well known, there are two general types of altimeter systems - a pulse radar altimeter and a frequency modulated, continuous wave (FM-CW) radio altimeter. Aircraft radio altimeters typically operate at altitudes from 0 to 8000 feet utilizing separate antennas for transmit and receive. Such radio altimeters have...

Welcome to Philadelphia, home of the 2003 International Microwave Symposium! The fifth-largest city in the United States and the second largest on the East Coast, Philadelphia (known from June 8-13, 2003 as Microwave Metropolis) is one of the world's most dynamic destinations. In Philadelphia, you will be at the...

This year the IEEE MTT-S International Microwave Symposium (IMS) and Exhibition will be held in Philadelphia, PA at the Pennsylvania Convention Center. Although the MTT-S Symposium was hosted by the Philadelphia Chapter of MTT-S at Cherry Hill, NJ in 1976, this is the first time the IMS will be...

Philadelphia, nestled between New York City and Washington, DC, has at times been overlooked or forgotten when noting major US cities. But since it is one of America's oldest cities (1682), Philly has had, I guess you could say, a little head start over other towns. No wonder she...