nAN400-06 Gerber files layouts have been made Nordic VLSI's nRF40

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nAN400-06 Gerber files layouts have been made Nordic VLSI's nRF40

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nRF402 antenna layout
nAN400-06
Gerber files layouts have been made Nordic VLSI's nRF402 Single Chip 433MHz Transmitter [1]. Three different loop antennas 433MHz have also been made available. Gerber files each layout compressed into archive format. archive files includes file named readme.wri that must read before importing Gerber files into editor. described layouts should fabricated standard 1.6mm double-sided printed circuit board.
layout nRF402
layouts include necessary circuitry design radio frequency part short range communication system based nRF402. transmitter data control lines DIN, PWR_UP available perimeter layout should connected digital part customer's application. also available perimeter layout. part application circuit should filtered separately from supply voltages digital circuitry. Star routing strictly recommended from supply source digital other parts application circuit. layouts presented below equal except antenna connection circuitry. Solutions differential connection loop antenna single ended connection antenna presented. 2.1. Differential connection loop antenna Figure shows schematics layout with differential connection loop antenna. layout shown Figure loop antenna layouts described chapter easily placed together with this layout. connection points numbered loop antenna layouts should connected exactly corresponding connection points numbered layout. loop antenna practical reasons connected further away from nRF402, connection symmetrical length tracks must exceed about 6cm. Since loop antenna tuned antenna, tuning antenna checked this case. Gerber files archive filename PCB_nRF402_diff.zip.
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nRF402 antenna layout
recommended external components given Table
Component
Description
ceramic chip capacitor, (Crystal oscillator) ceramic chip capacitor, (Crystal oscillator) ceramic chip capacitor, (Supply decoupling) ceramic chip capacitor, (Supply decoupling) ceramic chip capacitor, (Supply decoupling) ceramic chip capacitor, (Supply decoupling) inductor, Q>45 1/8W chip resistor, (Crystal oscillator) 1/8W chip resistor, (Transmitter power setting) Crystal
Size
0603 0603 0603 0603 1206 0603 0603 0603 0603
Value
221) 4.000
Tolerance
Units
Table Recommended External Components.
[1]. [1].
Single ended connection antenna using differential single ended matching network Figure shows schematics layout with single ended connection antenna using differential single ended matching network. layout shown Figure 2.2. antenna connection point should close possible output matching network. track between output matching network antenna connection point practical reasons exceed about 3cm, this track should carried microstrip line. standard printed circuit board with 1.54mm substrate thickness relative dielectric constant 4.45 433MHz, width microstrip line should 3mm. Gerber files archive filename PCB_nRF402_single_netw-1_1.zip. recommended external components given Table except supply decoupling capacitor with addition components differential single ended matching network given Table
Component
Description
ceramic chip capacitor, (Supply decoupling) ceramic chip capacitor ceramic chip capacitor ceramic chip capacitor Chip inductor, SRF>433 MHz3) Chip inductor, Q>45 Chip inductor, Q>45 Chip inductor
Size
0603 0603 0603 0603 0603 0603 0603 0603
Value
Tolerance
<±0.25 <±0.1 ±10%
Units
Table Recommended components differential single ended matching network
[1].
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nRF402 antenna layout
2.2uF 1206 0603
22pF 0603
4.000
22pF 0603
REFERENCE
VCO1 VCO2 PWR_UP ANT1 ANT2 RF_PWR PWR_UP Loop antenna connection 100pF 0603 aaaaaaaa
22nH 0603 4.7nF 0603 100pF 0603
nRF402 433MHz Single chip Transmitter SSOIC14 0603
Figure Schematics layout with differential connection loop antenna
silk screen
Bottom silk screen
view
Bottom view
Figure layout with differential connection loop antenna
Nordic VLSI Revision:
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February 2000
nRF402 antenna layout
2.2uF 1206 22pF 0603 0603
4.000
22pF 0603
REFERENCE
180nH 0603 22nH 0603 aaaaaaaa
VCO1 VCO2 PWR_UP ANT1 ANT2 RF_PWR PWR_UP
470pF 0603 1.8pF 0603 0603 22nH 22nH 0603 0603 1.5pF 0603
22nH 0603 4.7nF 0603 100pF 0603
nRF402 433MHz Single chip Transmitter SSOIC14 0603
Figure Schematics layout with single ended connection antenna using differential single ended matching network
silk screen
Bottom silk screen
view
Bottom view
Figure layout with single ended connection antenna using differential single ended matching network
Nordic VLSI Revision:
Vestre Rosten N-7075 Tiller, Norway Page
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February 2000
nRF402 antenna layout
Loop antenna layouts
loop antenna with T-match good solution cost small size radio modules. Three different layout solutions small rectangular loop antennas described below. Figure shows geometry designed rectangular loop antennas.
Figure Geometry rectangular loop antenna loop antenna physical parameters loop antenna length [mm] loop antenna width [mm] feed length [mm] width loop conductor
Each antenna tuned resonance frequency 433MHz with chip capacitors designed loop antennas, these capacitors should have tolerances better then resistor controls Q-value antenna. loop antennas tuned approximately with T-match. width loop conductor loop antennas 1mm. There ground plane beneath antennas. Table shows summary designed loop antennas.
Loop antenna [mm]
18x10 25x15 35x20
Feed length [mm]
21.5 22.5
Value [pF]
Tolerance [pF]
±0.25 ±0.1 ±0.1
Value [pF]
Tolerance [pF]
±0.25 ±0.25 ±0.1
RQ4)
Q-value
Table Summary loop antennas
Thick film chip resistor with resistance tolerance better.
Nordic VLSI Revision:
Vestre Rosten N-7075 Tiller, Norway Page
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February 2000
nRF402 antenna layout
Nordic VLSI Revision:
Vestre Rosten N-7075 Tiller, Norway Page
Phone
February 2000
nRF402 antenna layout
References
Product Specification nRF402, "433MHz Single Chip Transmitter", Nordic VLSI ASA. Application note nAN400-03, "Small loop antennas", Nordic VLSI ASA.
Revision:
Page
February 2000
nRF402 antenna layout
LIABILITY DISCLAIMER
Nordic VLSI reserves right make changes without further notice product improve reliability, function design. Nordic VLSI does assume liability arising application product circuits described herein.
LIFE SUPPORT APPLICATIONS
These products designed life support appliances, devices, systems where malfunction these products reasonably expected result personal injury. Nordic VLSI customers using selling these products such applications their risk agree fully indemnify Nordic VLSI damages resulting from such improper sale.
Application Note. Revision Date 29.02.2000. Application Note order code 290200-nAN400-06 rights reserved Reproduction whole part prohibited without prior written permission copyright holder.
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Main Office: Vestre Rosten N-7075 Tiller, Norway Phone: E-mail: nRF@nvlsi.no Visit Nordic VLSI website http://www.nvlsi.no

nAN400-06 Gerber files layouts have been made Nordic VLSI's nRF40

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