LSR TIWI5 Guide

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330-0093-R1.3 Copyright © 2012-2016 LSR Page 1 of 23
TIWI5
Antenna Design Guide
Last updated
February 11, 2016

TIWI5
ANTENNA DESIGN GUIDE
The information in this document is subject to change without notice.
330-0093-R1.3 Copyright © 2012-2016 LSR Page 2 of 23
Table of Contents
1Introduction ..........................................................................................................................3
1.1 Purpose & Scope.......................................................................................................................3
1.2 Applicable Documents...............................................................................................................3
1.3 Revision History.........................................................................................................................3
2Chip Antenna.........................................................................................................................4
2.1 Chip Antenna Specifications......................................................................................................4
2.2 Mechanical Dimensions.............................................................................................................5
2.3 Terminal Configuration ..............................................................................................................5
2.4 Typical Radiation Patterns.........................................................................................................6
3Dipole Antenna......................................................................................................................8
3.1 Dipole Antenna Specifications...................................................................................................9
3.2 Typical Radiation Patterns.......................................................................................................10
3.3 Mechanical Dimensions...........................................................................................................13
4PCB Layout Requirements ....................................................................................................14
4.1 Chip Antenna Reference Design PCB ....................................................................................15
4.2 Chip Antenna Reference Design Schematic...........................................................................16
4.3 Chip Antenna Matching Components......................................................................................17
4.4 Dipole Antenna PCB Layout Requirements............................................................................18
4.5 Dipole Antenna Reference Design PCB..................................................................................19
4.6 Dipole Antenna Reference Design Schematic........................................................................20
5EMC Compliance..................................................................................................................21
5.1 Summary .................................................................................................................................21
5.2 Module Integration Considerations –Antenna Systems .........................................................21
5.3 Module Integration Considerations –Substitute Antenna Systems ........................................22
5.4 Module Integration Considerations –Circuit Implementation..................................................22
5.5 Module Integration Considerations - Top Assembly................................................................22
5.6 Testing Requirements for End-Product...................................................................................22
5.7 SAR Testing Requirements for End-Product...........................................................................22
6Contacting LS Research ........................................................................................................23

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ANTENNA DESIGN GUIDE
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1.1 Introduction
1.2 Purpose & Scope
The purpose of this document is to provide details regarding the design and integration of
certified antennas to the TiWi5 module. It covers both a PCB mounted Chip Antenna as well as
an externally mounted whip antenna. It will inform the reader as to the required PCB layout
details and provide expected performance specifications.
1.3 Applicable Documents
TiWi5 Datasheet (330-0042)
ModFLEX Accessories 2.4/5.4 GHz Dipole Antenna Datasheet (330-0094)
Johanson Technology 2450AD46A5400 Datasheet
1.4 Revision History
Date
Change Description
Revision
2/3/2012
Initial release
1.0
9/11/2014
Removed Figure 7
1.1
6/17/2015
Added notes regarding module is not certified as a DFS Master, hence AP
mode is not allowed in the 5 GHz band.
1.2
Table 1 Revision History

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ANTENNA DESIGN GUIDE
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2Chip Antenna
The Johanson Technology ceramic chip antenna is a passive, surface mount component, based
on Low Temperature Co-fired Ceramic (LTCC) technology. This antenna exhibits linear
polarization and provides a near omni-directional radiation pattern. It is matched to 50 ohm
impedance and is well suited for integration to the LSR TiWi5 radio module.
The chip antenna is used external to the TiWi5 module as part of an overall solution for the LSR
TiWi5 radio module.
Johanson Part Number
Description
2450AD46A5400E
2.4/5.4 GHz Ceramic Dual Band Chip
Antenna
Table 2 –Chip Antenna Overview
2.1 Chip Antenna Specifications
Specification
Value
Peak Gain
+1 dBi
Impedance
50 ohms, Nominal
Type
Dipole
Polarization
Linear
VSWR
≤24：1, Maximum
Frequency
2.45/5.4 GHz
Input Power
3W max
Size
8.5mm × 1.6 mm
Operating Temperature
-40 to +85°C
Table 3 –Chip Antenna Specifications

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2.2 Mechanical Dimensions
Table 4 –Chip Antenna Mechanical Dimensions
2.3 Terminal Configuration
Table 5 –Chip Antenna Terminal Configuration
Typical Radiation Pattern Figure 1 - Chip Antenna Radiation Patterns (5 GHz)

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2.4 Typical Radiation Patterns
Figure 1 - Chip Antenna Radiation Patterns (2.4 GHz)

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ANTENNA DESIGN GUIDE
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Figure 2 - Chip Antenna Radiation Patterns (5 GHz)

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3Dipole Antenna
The LSR 001-0009 Dipole Antenna is used in conjunction with the LSR 080-0001 U.FL to Reverse
Polarity SMA Cable, and the Hirose PCB mounted U.FL connector, to provide an externally
mounted antenna solution for the LSR TiWi5 radio module.
Part Number
Description
LS Research
001-0009
2.4/5.5 GHz Dipole Antenna with Reverse Polarity
SMA Connector
LS Research
080-0001
U.FL to Reverse Polarity SMA Bulkhead Cable
105mm
Hirose
U.FL-R-SMT(10)
PCB Mounted U.FL Connector
Table 6 –Dipole Antenna Overview

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ANTENNA DESIGN GUIDE
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3.1 Dipole Antenna Specifications
Specification
Value
Gain
+2 dBi
Impedance
50 ohms, Nominal
Type
Dipole
Polarization
Linear Vertical
VSWR
≤2.0：1, Maximum
Frequency
2400-2500MHz, 5150-5850MHz
Weight
22g
Size
137 × 13 mm
Antenna Color
Black
Table 7 –Dipole Antenna Specifications

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ANTENNA DESIGN GUIDE
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3.2 Typical Radiation Patterns
Figure 3 –Dipole Antenna Pattern (LSR Antenna @ 2405 MHz)

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ANTENNA DESIGN GUIDE
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Figure 4 –Dipole Antenna Pattern (LSR Antenna @ 5250 MHz)

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ANTENNA DESIGN GUIDE
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Figure 5 –Dipole Antenna Pattern (LSR Antenna @ 5750 MHz)

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3.3 Mechanical Dimensions
Figure 6 –Dipole Antenna Dimensions

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ANTENNA DESIGN GUIDE
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4PCB Layout Requirements
Since this module and its associated set of approved antennas has been certified by the FCC and
Industry Canada (IC) as a Modular Radio, the end user is authorized to integrate this module into
an end-product, and is solely responsible for the Unintentional Emissions levels produced by the
end-product
In order to preserve the Modular Radio certifications, the integrator of the module must abide
by the PCB layout recommendations outlined in the following paragraphs. Any divergence from
these recommendations will invalidate the modular radio certifications and require the
integrator to re-certify the module and/or end-product.
The module must be used with one of the approved antennas:
1. LS Research 001-0009 center-fed dipole antenna and 080-0001 U.FL to Reverse Polarity SMA
connector cable.
2. Johnson 2450AD46A5400 2.4/5.4 GHz Ceramic Chip Antenna.

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ANTENNA DESIGN GUIDE
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4.1 Chip Antenna Reference Design PCB
Figure 7 –Chip Antenna Certified Reference Design PCB

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ANTENNA DESIGN GUIDE
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4.2 Chip Antenna Reference Design Schematic
Figure 8 –Chip Antenna Certified Reference Design Schematic

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4.3 Chip Antenna Matching Components
Figure 9 –Chip Antenna Certified Reference Design Matching Components Schematic
The matching circuit for the chip antenna consists of Capacitors C1, C2, C6, and Inductors L1, L4,
and L9 (NP - Not Populated). Refer to the table below for specifics on the matching
components.
Inductor
Value
Part Number
Description
L1, L4
1.8nH
Johanson L-05B1N8SV6T
0201 SMT INDUCTOR ±0.3nH
L9
1.8nH
Johanson L-05B1N8SV6T
*DO NOT POPULATE
C1
2pF
Johanson 250R05L2R0BV4T
0201 SMT CERAMIC CAPACITOR 25V NPO
±0.1pF
C2, C6
6.8pF
Johanson 250R05L6R8CV4T
0201 SMT CERAMIC CAPACITOR 25V NPO
±0.25pF
Table 8 –Chip Antenna Matching Components

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ANTENNA DESIGN GUIDE
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4.4 Dipole Antenna PCB Layout Requirements
Figure 10 –Dipole Antenna PCB Layout Requirements

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ANTENNA DESIGN GUIDE
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4.5 Dipole Antenna Reference Design PCB
Figure 11 –Dipole Antenna Certified Reference Design PCB

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ANTENNA DESIGN GUIDE
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4.6 Dipole Antenna Reference Design Schematic
Figure 12 –Dipole Antenna Certified Reference Design Schematic