LLNL’s Contained Firing Facility: Less bang saves more bucks
INTERNAL/EMBEDDED ANTENNAS MORE COMPACT DESIGN: SAVES SPACE MORE RUGGED: LESS SUSCEPTIBILITY TO...
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INTERNAL/EMBEDDED ANTENNAS MORE COMPACT DESIGN: SAVES SPACE MORE RUGGED: LESS SUSCEPTIBILITY TO DAMAGE From: http:// www.centurion.com
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Transcript of INTERNAL/EMBEDDED ANTENNAS MORE COMPACT DESIGN: SAVES SPACE MORE RUGGED: LESS SUSCEPTIBILITY TO...
INTERNAL/EMBEDDED ANTENNAS
MORE COMPACT DESIGN:
SAVES SPACE MORE RUGGED:
LESS SUSCEPTIBILITY TO DAMAGE
From: http:// www.centurion.com
SUITABLE CANDIDATES PIFA (PLANAR INVERTED-F
ANTENNA) MEANDER LINE ANTENNA
POSSIBLE LOCATIONS OF PIFA ON HANDSET
From: “FDTD Analysis of PIFA diversity antennas on a hand-held transreceiver unit” by Michael A. Jensen and Yahya Rahmat-Samii
SIDE AND FRONT VIEW OF PIFA
RADIATION PATTERN OF PIFA IN DIFFERENT PLANES
From: “Integrated Antennas for Hand-held Telephones with low Absorption’’ by Gert Frolund Rendersen, Jorgen Bach Andersen
REDUCTION OF ANTENNA SIZE
UNIVERSE MAY BE EXPANDING BUT THE SIZE OF ANTENNAS IN MOBILE PHONES IS SHRINKING….
WHY SMALLER ANTENNAS ?
HANDSET SIZE LIMITED BY THE SIZE OF BATTERY AND THE SIZE OF THE ANTENNA…
NEED TO HAVE MORE THAN ONE ANTENNA TO RECEIVE SIGNALS OF DIFFERENT POLARISATIONS…
CAPACITIVELY LOADED PIFA
USUALLY LENGTH IS (L/4).
IT REDUCES IT TO (L/8).
From: “A capacitively loaded PIFA for compact mobile telephoneHandsets’’ by Corbett R. Powell, Student Member IEEE, and R.D.
Murch, Member IEEE
LOADED PIFA
NEED FOR DUAL BAND OPERATION
PCS(PERSONAL COMMUNICATION SYSTEMS) REQUIRE MOBILE PHONES TO WORK AT 1800 MHz ALONGWITH THE USUAL 900 MHz BAND.
DUAL BAND PIFA 1
TRIPLE BAND PIFA
MEANDER LINE CONSTRUCTION
RADIATION PATTERN OF MEANDER LINE ANTENNA
PIFA WITH MEANDER LINES
DIVERSITY ANTENNAS
BPFA
COMPARISON OF CURRENT DISTRIBUTIONS
COMPARISON OF RADIATION PATTERN
DTSA CONSTRUCTION AND RADIATION PATTERN
COMPARISON WITH MONOPOLE IN TERMS OF SAR DISTRIBUTION
