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ARTICLES

Leadless SMT Cavity Filters

At present, market demand for miniaturization of SMT components is satisfied at the expense of poorer component insertion loss and limited levels of ultimate rejection. While high Q components offer increased range and/or reduced noise figure at the system level, miniaturized components fit mechanical constraints and tight budgets. The...
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K&L MICROWAVE CONTRIBUTION FUNDS EQUIPMENT, SCHOLARSHIPS

Salisbury University (SU) students pursuing a career in engineering received a boost recently when representatives from K&L Microwave Inc. presented the Salisbury University Foundation Inc., $30,000 to help fund lab equipment and scholarships. The contribution was the third installment of a $150,000 endowment from K&L. The endowment will create...
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A Modular Switch Filter Bank

A new modular switch filter bank is featured
For many years switch filter banks have been designed as custom RF assemblies with long lead-time, large NRE charges and extreme custom packaging and specifications. A new modular approach to switch filter bank design has been introduced that provides the design engineer with the opportunity to maintain a custom...
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Low Power Delay Filters for MCPA Applications

This month's cover features a multicarrier power amplifier
COVER FEATURE Low Power Delay Filters for MCPA Applications K&L Microwave Inc. Salisbury, MD M ulticarrier power amplifiers (MCPA) and their importance to wide modulation have received extensive coverage in recent literature. 1 The demand for faster data rates has given a boost to the MCPA industry and magnified...
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Cavity and Surface-mount Delay Line Filters for Feedforward Power Amplifiers

Delay line filters in cavity and surface-mount styles for enhanced performanced in feedforward amplifier appliactions
Cavity and Surface-mount Delay Line Filters for Feedforward Power Amplifiers K&L Microwave Inc. Salisbury, MD In their quest for reduced levels of intermodulation distortion (IMD), power amplifier manufacturers utilize feedforward techniques to implement either multiple carrier power amplifiers or single wideband carrier power amplifiers. The feedforward technique relies on...
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A Tunable, Dielectric-loaded Waveguide Filter

A newly developed high performance tunable filter that utilizes dielectric-loaded waveguide is featured on this month's cover
A Tunable, Dielectric-loaded Waveguide Filter K&L Microwave Inc. Salisbury, MD The personal communications service and cellular markets have placed high demands on filter manufacturers, including the need for low insertion loss with very high selectivity while maintaining 3 dB bandwidths of less than one percent. Fixed-frequency filters have been...
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A Dual-band AMPS/PCS Duplexer

An Advanced Mobile Phone System (AMPS)/personal communications service (PCS) duplexer offering an improved method of testing dual-band handsets for nexxt-generation mobile telephones
A Dual-band AMPS/PCS Duplexer K&L Microwave Inc. Salisbury, MD Competition in the mobile wireless marketplace has become intensely competitive, particularly with the worldwide deployment of the digital communication system (DCS), personal communications service (PCS) and satellite networks. Wireless service providers have responded by making available nationwide (or international, as...
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A Conductor-loaded Resonator Filter with a Wide Spurious-free Stop Band

This month's cover features a dual-mode filter with a new configuration that uses different-sized conductor-loaded resonators
A Conductor-loaded Resonator Filter with a Wide Spurious-free Stop Band K&L Microwave Inc. Salisbury, MD The newly opened personal communications service (PCS) market demands a large number of base station filters with extraordinarily strict requirements on both in-band and out-of-band characteristics. High selectivity, high rejection, low loss and extremely...
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