Coupler design delivers low-ripple performance
Article Abstract:
A non-uniform, high-pass and conventional stripline directional coupler equipped with a cos4 coupling variation was found to be capable of substantially lessening in the frequency response of a coupler the ripple levels. The finding was made after comparing the performance of a cos4-coupling-variation-equipped directional coupler with that of a cos-variation-equipped directional coupler at similar coupler-length levels and coupling-factor argument. Microwave parts equipped with very wide operating bandwidth levels enjoy demand due to requirements for broad-frequency-range instrumentation, electronic-counter-countermeasures and electronic-countermeasures equipment.
Comment:
Stripline directional couplers w/ cos4 coupling variation can substantially cut ripple levels in a coupler's frequency response
Publication Name: Microwaves & RF
Subject: Engineering and manufacturing industries
ISSN: 0745-2993
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
Single IC contains driver and power FETs
Article Abstract:
Oki Semiconductor of Sunnyvale, CA, has unveiled its KGF2236, a cellular phone that has both a GaAs power field-effect transistor (FET) and a +3-VDC driver GaAs FET on a single chip. The device, made using ion-implanted GaAs metal-semiconductor-FET (MESFET) technology, is capable of achieving a power-added efficiency (PAE) of up to 70% using a +3-VDC power supply. Oki's KGF2236, by integrating both driver and power supply on a single chip, is capable of giving improved performance for less cost and less needed space.
Comment:
Has unveiled its KGF2236, a cellular phone that has both a GaAs power field-effect transistor and a +3-VDC driver GaAs FET
Publication Name: Microwaves & RF
Subject: Engineering and manufacturing industries
ISSN: 0745-2993
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Solving the documentation dilemma. Measuring performance after meeting award criteria
- Abstracts: Delivery capability and firm performance in international operations. A note on scheduling of two-stage flow shop with multiple processors
- Abstracts: Coal conversion keeps itself relevant. Hot air boasts efficiency gains in power generation
- Abstracts: LNA quiets mobile satcom receivers. Approach performs RF detection directly
- Abstracts: Seven-plus-digit meter resolves a nanovolt. Biometric verification galore in a single package. Hybrid PWM amplifier switches at 0.5 MHz