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

Product information, Other Electronic Component Manufacturing, Communications Coupling Assemblies

---

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

Product introduction, Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing, Cellular Mobile Tel Equip, Wireless telephones, Oki Semiconductor

---

Similar abstracts:

• 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

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.