Product Info

ManualsBrandsSensicast Systems ManualsElectronicsSpread Spectrum Transmitter

DATA GUIDE

“SPLATCH” PLANAR

ANTENNAS

INTRODUCTION

The “Splatch” is a breakthrough in compact antenna

technology. It combines excellent performance and

cost-effectiveness into an antenna package that can be

integrated, even by designers lacking RF test equipment.

Despite its simplicity and ease of use the “Splatch” should

not be thought of as “just any other part”. Its correct function

is critical to the performance of your overall device.

Dropping the “Splatch” in the center of your board like any

popcorn IC will likely yield dismal results. It is critical to

follow the guidelines below in order to obtain proper

function.

0.062"

GROUNDED LINE PLANAR ANTENNA

433-SP

1.102"

0.200"

0.540"

GROUNDED LINE PLANAR ANTENNA

433-SP

ANT. FEED

GROUND

GROUNDED LINE PLANAR ANTENNA

433-SP

Physical Dimensions

Electrical Connections

Preliminary - Revised 5/30/2000

APPLICATIONS INCLUDE:

■ Remote control

■ Keyless entry

■ Garage / Gate openers

■ Lighting control

■ Medical monitoring

■ Remote data transfer

■ Fire / Security systems

■ RFID

■ Pagers

PART # DESCRIPTION

ANT-***-SP Splatch Planar

Antenna

*** Insert Frequency

315, 418, 433, 868, 916

Custom frequencies available with NRE.

Splatch antennas are supplied in tube

packaging - 20 pcs. per tube.

Tape and reel available at extra cost on

request.

ORDERING INFORMATION

FEATURES:

■ Low Cost

■ Eliminates unsightly external antennas

■ Easily concealed

■ Direct PCB mounting

■ Reflow compatible

■ Stable grounded-line element

■ Excellent proximity performance

■ 10MHz approximate useable bandwidth

Summary of content (8 pages)

PAGE 1
DATA GUIDE “SPLATCH” PLANAR ANTENNAS INTRODUCTION The “Splatch” is a breakthrough in compact antenna technology. It combines excellent performance and cost-effectiveness into an antenna package that can be integrated, even by designers lacking RF test equipment. Despite its simplicity and ease of use the “Splatch” should not be thought of as “just any other part”. Its correct function is critical to the performance of your overall device.
PAGE 2
ATTACHMENT The antenna pads are designed to support both hand and automated placement. Castellations have been provided to ease solder introduction during hand assembly. The parts are also fully compatible with the reflow process for automated assembly. APPLICATION CONSIDERATIONS When implemented correctly the “Splatch” will yield outstanding and repeatable results. However, the “Splatch” was designed with very specific feed and mounting requirements.
PAGE 3
FEED CONSIDERATIONS Like most reduced-size antennas the “Splatch” has a fairly high Q and thus exhibits narrow bandwidth characteristics. The single most critical element in insuring the optimum function of the “Splatch” is to minimize the length of the feed trace (Transmission Line) to the “Splatch” itself. The feed trace should be less than .25" and in all cases microstripped.
PAGE 4
SPLATCH SERIES PERFORMANCE DATA About These Measurements The typical performance graphs below were based on a "Splatch" antenna affixed to the test jig illustrated, and measured with a HP-8753D network analyzer in a 20°-25°C environment. *As of the time of this publication, full pattern characterization data was not available. Refer to the Linx website for periodic updates to this document.
PAGE 5
; ; ;;;;;;; ; ; ; ; ; ; ; Splatch Under Test 0.550" Vias To Groundplane 8" of RG-174 Cable .062 FR4 Substrate 3.000" 1 oz. Copper Groundplane on Rear 1.500" TESTING Several methods may be employed to verify the optimization of the “Splatch” in your product design. They are listed below in order of preference. A) Utilize a network analyzer to verify resonance and VSWR. B) Use a Spectrum Analyzer and Signal Generator to sweep the antenna and find the frequency of highest output.
PAGE 6
MISMATCH CONVERSION TABLE VSWR Insertion Loss (dB) 17.391 11.610 8.724 6.997 5.848 5.030 4.419 3.946 3.570 3.010 2.615 2.323 2.100 1.925 1.433 1.222 1.119 1.065 1.034 1.020 Power Transmitted (%) -6.87 -5.35 -4.33 -3.59 -3.02 -2.57 -2.20 -1.90 -1.65 -1.26 -0.97 -0.75 -0.58 -0.46 -0.14 -0.04 -0.01 0.00 0.00 0.00 Power Reflected (%) 20.57% 29.21% 36.90% 43.77% 49.88% 55.33% 60.19% 64.52% 68.38% 74.88% 80.05% 84.15% 87.41% 90.00% 96.84% 99.00% 99.68% 99.90% 99.97% 99.99% 79.43% 70.79% 63.10% 56.23% 50.
PAGE 7
Power Conversion Tables For 50Ω System dBm mW dBmV mVRMS mVp mVpp -50 0.000 -3.0 0.7 1.0 2.0 -45 0.000 2.0 1.3 1.8 3.6 -40 0.000 7.0 2.2 3.2 6.3 -35 0.000 12.0 4.0 5.6 11.2 -30 0.001 17.0 7.1 10.0 20.0 -25 0.003 22.0 12.6 17.8 35.6 -20 0.0l 0 27.0 22.4 31.6 63.2 -15 0.032 32.0 39.8 56.2 112.5 -10 0.100 37.0 70.7 100.0 200.0 -5 0.316 42.0 125.7 177.8 355.7 0 1.000 47.0 223.6 316.2 632.5 1 1.259 48.0 250.9 354.8 709.6 2 1.585 49.
PAGE 8
U.S. CORPORATE HEADQUARTERS: LINX TECHNOLOGIES, INC. 575 S.E. ASHLEY PLACE GRANTS PASS, OR 97526 Phone: (541) 471-6256 FAX: (541) 471-6251 http://www.linxtechnologies.com Disclaimer Linx Technologies is continually striving to improve the quality and function of its products; for this reason, we reserve the right to make changes without notice. The information contained in this Data Sheet is believed to be accurate as of the time of publication. Specifications are based on representative lot samples.