"Splatch" breakthrough compact antenna technology. combines excellent

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"Splatch" breakthrough compact antenna technology. combines excellent

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DATA GUIDE "SPLATCH" PLANAR ANTENNAS
"Splatch" breakthrough compact antenna technology. combines excellent performance cost-effectiveness into antenna package that integrated, even designers lacking test equipment. Despite simplicity ease "Splatch" should thought "just other part". correct function critical performance your overall device. Dropping "Splatch" center your board like popcorn will likely yield dismal results. critical follow guidelines below order obtain proper function.
433-SP
0.062"
GROUNDED LINE PLANAR ANTENNA
1.102"
433-SP
GROUNDED LINE PLANAR ANTENNA 0.200" 0.540"
FEATURES:
Cost
Physical Dimensions
Eliminates unsightly external antennas Easily concealed Direct mounting Reflow compatible
433-SP
GROUNDED LINE PLANAR ANTENNA
Stable grounded-line element
Excellent proximity performance
10MHz approximate useable bandwidth
Electrical Connections
APPLICATIONS INCLUDE:
Remote control Keyless entry
ORDERING INFORMATION
PART
ANT-***-SP
DESCRIPTION
Splatch Planar Antenna
Garage Gate openers Lighting control Medical monitoring Remote data transfer Fire Security systems RFID Pagers
Insert Frequency 315, 418, 433, 868,
Custom frequencies available with NRE. Splatch antennas supplied tube packaging pcs. tube. Tape reel available extra cost request.
Preliminary Revised 5/30/2000
ATTACHMENT
antenna pads designed support both hand automated placement. Castellations have been provided ease solder introduction during hand assembly. parts also fully compatible with reflow process automated assembly.
FEED CONSIDERATIONS
Like most reduced-size antennas "Splatch" fairly high thus exhibits narrow bandwidth characteristics. single most critical element insuring optimum function "Splatch" minimize length feed trace (Transmission Line) "Splatch" itself. feed trace should less than .25" cases microstripped. term "Microstrip" refers trace passed over groundplane width appropriate create 50-ohm transmission line between module antenna. Since antenna does present true stable 50-ohm match, feed trace tends lower antenna's resonant frequency. Given antenna's narrow bandwidth, easily detuned length feed trace; thus, trace should kept short possible. Additional microstrip details available reference section this guide
APPLICATION CONSIDERATIONS
When implemented correctly "Splatch" will yield outstanding repeatable results. However, "Splatch" designed with very specific feed mounting requirements. Failure designer respect these requirements will result unsatisfactory performance. antenna tuned direct mounting product's PCB. Mounting antenna other manner will produce poor results. antenna should with trace <=.25". Longer runs coax feeds recommended. Nothing should placed under directly beside antenna element. Generally, mounting antenna front product illustrated will yield best results.
LAYOUT CONSIDERATIONS
Improper placement planes, traces components will result antenna nulls complete detuning. First, area under antenna board layers should completely free components, traces, groundplane. addition, components traces should pass within .25" top, sides, front back antenna. Ideally antenna will mounted board given unobstructed field view directions. Components placed area below back edge antenna will have little effect since antenna null back edge when referenced appropriately groundplane. Components placed sides antenna items such displays mounted proximity antenna will produce nulls and, possibly, detuning. antenna referenced groundplanes different surface areas; however, been optimized 1.5"x plane area. best performance lowest VSWR will obtained when referenced plane similar area. recommended layout illustrated below. layer board generally antenna mounting pads feed trace. ground pads connected groundplane layer through vias. care sizing placement vias prevent solder migration from attachment pads during attachment.
433-SP
Groundplane/Copper/Trace Area BARE
.25" Less Microstripped Feedline
GROUNDED LINE PLANAR ANTENNA
Vias Groundplane
Typical Remote Control Application
Page Page
Groundplane Rear Board
0.090"
Vias Groundplane
0.100"
Layer
Bottom Layer
Pads outline shown groundplane position reference only.
SPLATCH SERIES PERFORMANCE DATA
About These Measurements typical performance graphs below were based "Splatch" antenna affixed test illustrated, measured with HP-8753D network analyzer 20°-25°C environment. time this publication, full pattern characterization data available. Refer Linx website periodic updates this document.
Specification <1.7 Typ. Frequency 433.92 433.92 <1.7 Typ. <1.7 Typ. <1.7 Typ. <1.7 Typ. Units Ohms Notes
0.550"
Electrical Length Center Frequency Useable Bandwidth Characteristic Impedence VSWR Gain/<Loss>
Notes: Specified Frequency;
3.000"
Copper Groundplane Rear
VSWR <2.0;
Relative isotropic;
Preliminary
TYPICAL SMITH CHART
51.189 -5.3926 70.607
TESTING
Several methods employed verify optimization "Splatch" your product design. They listed below order preference.
START FREQ. 250.000 STOP FREQ. Marker
TYPICAL VSWR GRAPHS
Utilize network analyzer verify resonance VSWR.
433.92
Spectrum Analyzer Signal Generator sweep antenna find frequency highest output. *NOTE* characterized calibrated antenna must used Spectrum Analyzer order meaningful results obtained.
Test range results your environment. your product performs your requirements, cease engineering efforts sell
MARKER
MARKER
MARKER
Start Frequency 800.000 Stop Frequency 1100.000 Marker 1.868 VSWR Marker 1.435 VSWR Marker 1.58 VSWR
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;;;;; ;;;;;
RG-174 Cable 1.500"
Splatch Under Test
Vias Groundplane
.062 Substrate
Page
MISMATCH CONVERSION TABLE
VSWR Insertion Loss (dB) -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 Transmitted 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% Power Reflected 79.43% 70.79% 63.10% 56.23% 50.12% 44.67% 39.81% 35.48% 31.62% 25.12% 19.95% 15.85% 12.59% 10.00% 3.16% 1.00% 0.32% 0.10% 0.03% 0.01%
Power Conversion Tables System
0.000 0.000 0.000 0.000 0.001 0.003 0.0l 0.032 0.100 0.316 1.000 1.259 1.585 1.995 2.512 3.162 3.981 5.012 6.310 7.943 10.000 12.589 15.849 19.953 25.119 31.623 39.811 50.119 63.096 79.433 100.000 125.893 158.489 199.526 251.189 316.228 398.107 501.187 630.957 794.328 1000.000
dBmV
-3.0 12.0 17.0 22.0 27.0 32.0 37.0 42.0 47.0 48.0 49.0 50.0 51.0 52.0 53.0 54.0 55.0 56.0 57.0 58.0 59.0 60.0 61.0 62.0 63.0 64.0 65.0 66.0 67.0 68.0 69.0 70.0 71.0 72.0 73.0 74.0 75.0 76.0 77.0
mVRMS
12.6 22.4 39.8 70.7 125.7 223.6 250.9 281.5 315.9 354.4 397.6 446.2 500.6 561.7 630.2 707.1 793.4 890.2 998.8 1120.7 1257.4 1410.9 1583.0 1776.2 1992.9 2236.1 2508.9 2815.0 3158.5 3543.9 3976.4 4461.5 5005.9 5616.7 6302.1 7071.1
10.0 17.8 31.6 56.2 100.0 177.8 316.2 354.8 398.1 446.7 501.2 562.3 631.0 707.9 794.3 891.3 1000.0 1122.0 1258.9 1412.5 1584.9 1778.3 1995.3 2238.7 2511.9 2818.4 3162.3 3548.1 3981.1 4466.8 5011.9 5623.4 6309.6 7079.5 7943.3 8912.5 10000.0
mVpp
11.2 20.0 35.6 63.2 112.5 200.0 355.7 632.5 709.6 796.2 893.4 1002.4 1124.7 1261.9 1415.9 1588.7 1782.5 2000.0 2244.0 2517.9 2825.1 3169.8 3556.6 3990.5 4477.4 5023.8 5636.8 6324.6 7096.3 7962.1 8933.7 10023.7 11246.8 12619.1 14158.9 15886.6 17825.0 20000.0
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
MICROSTRIP DETAILS
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Trace
Board
Ground-plane
Er+1
1+12d
1.393 0.667
+1.444
Dielectric Constant 2.55
Width/Height (W/d)
Effective Dielectric Constant 3.59 3.07 2.12
Characteristic Impedance 50.0 51.0 48.0
Microstrip formulas Dielectric constant material)
Page Page
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S.E. ASHLEY PLACE GRANTS PASS, 97526
Phone: (541) 471-6256 FAX: (541) 471-6251
http://www.linxtechnologies.com
Disclaimer
Linx Technologies continually striving improve quality function products; this reason, reserve right make changes without notice. information contained this Data Sheet believed accurate time publication. Specifications based representative samples. Values vary from guaranteed. Linx Technologies makes guarantee, warranty, representation regarding suitability product specific application. None these devices intended applications critical nature where safety life property risk. user assumes full liability product such applications. Under conditions will Linx Technologies responsible losses arising from failure device application, other than repair, replacement, refund limited original product purchase price. Some devices described this publication patented. Under circumstances shall user conveyed license right ownership these patents.
2000 Linx Technologies, Inc. stylized Linx logo, Linx, "Wireless Made Simple" trademarks Linx Technologies, Inc. Printed U.S.A. Page

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