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Pagers project design company,PCB circuit diagram design
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Pagers project design company,PCb circuit diagram design engineering,electronics design low cost shenzhen China
New formulae for practical pager design
Massey, P.J.
Antennas and Propagation, 2001. Eleventh International Conference on (IEEE Conf. Publ. No. 480)
Volume 1, Issue , 2001 Page(s):265 - 268 vol.1
Digital Object Identifier
Summary:The antennas used in VHF and UHF pagers are electrically small loops, which are highly resonant devices that are resistant to detuning through user proximity. The antennas are often designed using a combination of computer simulation and experimental measurement techniques. Electronics (281)
Electronics:Devices:Connector (40)
Electronics:Devices:Power_supply (92)
Electronics:Devices:Thermal (24)
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Access Control Technologies - Card systems for cashless transactions, revenue (debit), and access control.
Ace Antenna Company - Advanced communication engineering
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Product Image Description Supplier Name Region Contact
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Compact Siren with High Quality Output for Pagers
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Piezoelectric and Ceramic Buzzers
Piezoelectric and Ceramic Buzzers, Available in Low Profile Design for Pagers
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Clinical Thermometer
Clinical Thermometer with Automatic Shut-off and Beeper Function
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Compact Siren
Compact Siren with High Quality Output for Pagers
AL Goodwell Industries Ltd
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Hong Kong SAR
pagers PCB assembly
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pagers PCB assembly, Electronic manufacturing
Parking Sensor | Speaker System Sub-Woofer | Low-Noise Ultrasonic Sensor
Rank:
Piezoelectric and Ceramic Buzzers
Piezoelectric and Ceramic Buzzers for Computers and Pagers
AL Goodwell Industries Ltd
307 products | News/Research
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Advanced Components Industries, inc. - Power Transformers and Power Relays
Advanced Power Technology Inc. - APT specializes in high voltage, high power semiconductors.
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However analytic formulae are also useful in suggesting prototype arrangements and in showing how the performance varies with geometry, matching and proximity induced losses. Philips have developed many world-leading techniques for designing VHF and UHF pager antennas. This paper summarises several previously unpublished results. The paper presents a simple formula for the efficiency of isolated air filled rectangular strip loops is presented. It discusses the effect of user proximity induced losses and mismatch. A simple method of mitigating the mismatch effects is outlined. Including PCB tracks in the loop can seriously degrade the antenna's performance. However for manufacturing reasons it is best for the trimmer capacitor to be mounted on the PCB. The paper discusses how this can be done and explains how, despite high loss tangents at UHF,
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Pagers project design company,PCb circuit diagram design engineering,electronics design low cost shenzhen China
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design: Pagers PCB // Circuit Diagram design
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