ANTENNA DESIGN GUIDE. Last updated February 10, The information in this document is subject to change without notice. - PDF

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TIWI-UB1 Last updated February 10, R1.2 Copyright 2013 LS Research, LLC Page 1 of 26 Table of Contents 1 Introduction Purpose & Scope Applicable Documents Revision
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TIWI-UB1 Last updated February 10, R1.2 Copyright 2013 LS Research, LLC Page 1 of 26 Table of Contents 1 Introduction Purpose & Scope Applicable Documents Revision History PCB Trace Antenna PCB Trace Antenna Specifications Dipole Antenna Dipole Antenna Specifications Mechanical Dimensions PCB Layout Requirements Reference Design PCB Reference Design Schematic Reference Design BOM Reference Design Gerber Files Reference Design - U.FL RF Trace Dimensions U.FL Connector Drawing EMC Compliance Summary Module Integration Considerations - Antenna Systems Module Integration Considerations - Substitute Antenna Systems Module Integration Considerations - Circuit Implementation Module Integration Considerations - Top Assembly Testing Requirements for End-Product SAR Testing Requirements for End-Product Contacting LS Research R1.2 Copyright 2013 LS Research, LLC Page 2 of 26 1 Introduction R1.2 Copyright 2013 LS Research, LLC Page 3 of 26 2 Purpose & Scope The purpose of this document is to provide details regarding the design and integration of certified antennas to the TiWi-uB1 module. It covers both a PCB trace antenna as well as an externally mounted dipole antenna. It will inform the designer as to the required PCB layout details, and provide expected performance specifications R1.2 Copyright 2013 LS Research, LLC Page 4 of 26 3 Applicable Documents TiWi-uB1 Datasheet ( ) TiWi-uB1 EM Board Users Guide ( ) LS Research 2.4 GHz Dipole Antenna Datasheet ( ) LS Research U.FL to RPSMA Cable Datasheet ( ) R1.2 Copyright 2013 LS Research, LLC Page 5 of 26 4 Revision History Date ECN Change Description Revision 8/14/ Initial Release 1.0 9/10/ Added Reference boards BOM, Gerber Plots, U.FL RF Trace Dimensions, U.FL Drawing 1.1 Table 1 Revision History R1.2 Copyright 2013 LS Research, LLC Page 6 of 26 5 PCB Trace Antenna The PCB trace antenna is Intrinsic to the TiWi-uB modules. Since the PCB trace antenna is integrated onto the module, the end user does not incur the added cost of adding an external antenna to their end product. LSR Part Number Description C R TiWi-uB1 Module with PCB Trace Antenna Table 2 PCB Trace Antenna Overview 5.1 PCB Trace Antenna Specifications Specification Peak Gain Type Polarization Frequency Value -4.2 dbi PCB Trace Linear Vertical MHz Table 3 PCB Trace Antenna Specifications R1.2 Copyright 2013 LS Research, LLC Page 7 of 26 6 Dipole Antenna The LSR Dipole Antenna is used in conjunction with the LSR U.FL to Reverse Polarity SMA Cable, and the Hirose PCB mounted U.FL connector, to provide an externally mounted antenna solution for the TiWi-uB module. Part Number Description C R TiWi-uB1 Module, RF Castellation LS Research GHz Dipole Antenna with Reverse Polarity SMA Connector LS Research U.FL to Reverse Polarity SMA Bulkhead Cable 105 mm Hirose U.FL-R-SMT(10) PCB Mounted U.FL Connector Table 4 Dipole Antenna Overview R1.2 Copyright 2013 LS Research, LLC Page 8 of 26 6.1 Dipole Antenna Specifications Specification Gain Impedance Type Polarization VSWR Frequency Weight Size Antenna Color Value +2 dbi 50 ohms, Nominal Dipole Linear Vertical 2.5:1, Maximum MHz 13g mm Black Table 5 Dipole Antenna Specifications R1.2 Copyright 2013 LS Research, LLC Page 9 of 26 6.2 Mechanical Dimensions Figure 1 Dipole Antenna Dimensions R1.2 Copyright 2013 LS Research, LLC Page 10 of 26 7 PCB 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 endproduct. 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. On module PCB trace antenna. 2. LS Research center-fed 2.4 GHz dipole antenna and U.FL to Reverse Polarity SMA connector cable. PCB Trace Antenna Implementation When using the PCB Trace Antenna version of the module (Part Number ), the PCB layout can be removed entirely, as the RF signal does not come out of the module. It is acceptable to keep the U.FL circuitry, and the components J3, C13, C14, and R7 can either be populated or not. 2.4 GHz Dipole Antenna Implementation When using the RF castellation version of the module (Part Number ), and the certified 2.4 GHz Dipole Antenna and U.FL to RPSMA Cable, the PCB layout shown in Section 7.1 should be followed. Components J3 and R7 should be populated as shown in the schematic in Section R1.2 Copyright 2013 LS Research, LLC Page 11 of 26 7.1 Reference Design PCB Figure 2 Reference Design PCB R1.2 Copyright 2013 LS Research, LLC Page 12 of 26 7.2 Reference Design Schematic Figure 3 Reference Design Schematic R1.2 Copyright 2013 LS Research, LLC Page 13 of 26 7.3 Reference Design BOM Qty 1 B1 PCB Ref Pop Option Value Tolerance Manufacturer Mfg Part Number Memory Protection Devices BU2032SM-G 1 C1 NP 100nF +/- 10% Murata GRM155R71C104KA88# 2 C13 C14 NP LSR C16 NP 2.4pF +/- 0.1pF Johanson Technology 250R05L2R4BV4T 1 C2 100pF +/- 5% Murata GRM1555C1H101JA01# 2 C3 C6 100nF +/- 10% Murata GRM155R71C104KA88# 2 C5 C7 12pF +/- 5% Murata GRM1555C1H120JA01# C8 C9 C11 4 C15 2.2uF +/- 20% Kemet C0402C225M9PAC# 2 FB1 FB2 Murata BLM15HG102SN1# 2 J1 J2 Samtec SFM L-D-A 1 J3 Hirose U.FL-R-SMT-1# 2 J4 J5 Sullins NRPN121PAEN-RC 1 J6 AMP J8 Sullins GRPB052VWQS-RC 1 J9 NP Sullins PRPN021PAEN-RC JMP1 JMP2 3 JMP3 Sullins SPN02SXCN-RC 3 JP1 JP2 JP3 Sullins NRPN031PAEN-RC 1 L1 2.2uH +/- 30% Murata LQM21PN2R2NGC# 2 L2 L4 5.6nH +/- 0.3nH Johanson Technology L-07C5N6SV6T 1 LED1 Kingbright APTB1612ESGC-F01 1 MOD1 Gigatek C 1 PCB1 LSR Q4 Fairchild FDN340P 2 R1 R3 10K 5% KOA RK73B1ET#103J 2 R2 R % Vishay CRCW RFK# 2 R5 R10 2.7K 1% Vishay CRCW04022K70FK# 1 R7 0 50m Ohm Max KOA RK73Z1ET# 1 R8 NP 10K 5% KOA RK73B1ET#103J 2 S1 S2 Panasonic EVQ-PNF04M 1 U1 Texas Instruments TPS62730DRY# 1 U2 Texas Instruments TMP100NA# 1 X1 ECS ECS B Notes: # designates mfg material package option. NP designates a component that is not populated R1.2 Copyright 2013 LS Research, LLC Page 14 of 26 Table 6 Reference Design EM Board BOM TiWi-uB1 Module R1.2 Copyright 2013 LS Research, LLC Page 15 of 26 7.4 Reference Design Gerber Files Figure 4 - Top Layer (1) with Silkscreen and Solder Mask Gerber R1.2 Copyright 2013 LS Research, LLC Page 16 of 26 Figure 5 Top Layer (1) Gerber R1.2 Copyright 2013 LS Research, LLC Page 17 of 26 Figure 6 - Layer 2 Gerber R1.2 Copyright 2013 LS Research, LLC Page 18 of 26 Figure 7 - Layer 3 Gerber R1.2 Copyright 2013 LS Research, LLC Page 19 of 26 Figure 8 Bottom Layer (4) Gerber R1.2 Copyright 2013 LS Research, LLC Page 20 of 26 Figure 9 Bottom Layer (4) with Silkscreen and Solder Mask Gerber R1.2 Copyright 2013 LS Research, LLC Page 21 of 26 7.5 Reference Design - U.FL RF Trace Dimensions Figure 10 U.FL RF Trace Details R1.2 Copyright 2013 LS Research, LLC Page 22 of 26 7.6 U.FL Connector Drawing Figure 11 U.FL Connector Drawing R1.2 Copyright 2013 LS Research, LLC Page 23 of 26 8 EMC Compliance 8.1 Summary The TiWi-uB1 module has been tested and approved as a Modular Radio in accordance with the appropriate FCC and IC standards. The supporting test data may be found in the modular test report. Since this module and its associated set of approved antennas have been certified as a Modular Radio, this allows the end user to integrate this module into an end-product without the requirement of recertifying the radio module. The module-integrator is responsible for the unintentional conducted and radiated emissions and must verify that the integrated product is compliant with the rules associated with unintentional radiators. The module integrator is also required to maintain an engineering record of the verification testing and declare on the product through proper labeling and marking that the device is compliant with these particular rules. The module integrator is responsible for using the patch file that corresponds to the antenna configuration and region for EMC compliance. The installed module s FCC ID and IC numbers need to be clearly marked on the product with the following verbiage Contains FCC ID: TFB-BT2 and Contains IC: 5969A-BT2 . The TiWi-uB1 has been certified for use in a portable configuration, which allows a transmitting device to be used with any part of its radiating structure in direct contact with the user s body or within 20 cm of the body of a user or bystanders under normal operating conditions. 8.2 Module Integration Considerations - Antenna Systems The module must be used with one of the approved antennas: 1. On module PCB trace antenna. 2. LS Research center-fed 2.4 GHz dipole antenna and LS Research U.FL to Reverse Polarity SMA connector cable. The antenna should be placed such that it is minimally disturbed by the product s packaging material. The incorporation of the largest practical free-space clearance around the antenna is important for maximizing overall performance. Further, the antenna must be placed such that at least a 20 cm separation distance is maintained from the antenna to all other radio transmitters. 8.3 Module Integration Considerations - Substitute Antenna Systems The module s certification is only valid for the list of approved antennas presented in section 4. However, substitute antennas may be used in place of the approved antenna only if the antennas are of the same type and the peak gain is less than or equal to the peak gain of the similar approved antenna. Also the antennas should have similar in-band and out-of-band characteristics. 8.4 Module Integration Considerations - Circuit Implementation It is recommended that all connection PCB (printed circuit board) traces to the power supply and digital control terminal be as short as possible. Though not necessarily required in all cases, it is R1.2 Copyright 2013 LS Research, LLC Page 24 of 26 a best practice to provide an optional shunt capacitor placement at the module pin on all active and routed power supply and digital control lines. Further, a series damping resistor placement should be incorporated between the module pin/shunt capacitor node and the source/sink of the digital control signals. This provides for effective bypassing and decoupling of digital lines from the radio module, in the event that the application circuit has longer power supply and digital routing. 8.5 Module Integration Considerations - Top Assembly In addition to the recommendations given for the antenna systems and the module placement onto a product PCB, it is recommended that all wiring and interconnect systems within the product be not routed anywhere close the module and its associated circuitry on the PCB, doing so could change the emission characteristics of the module. 8.6 Testing Requirements for End-Product Once the module is integrated and the product realized in a mobile or portable configuration, the product must be tested and follow the verification process for Unintentional Conducted and Radiated Emissions in accordance to the FCC and IC guidelines. The module needs to be powered and placed in the receive mode for this test. The receiver must be tuned to its lowest frequency channel, midfrequency channel, and highest frequency channel. The supporting test data does not need to be submitted to the FCC or IC. 8.7 SAR Testing Requirements for End-Product Since the TiWi-uB1 radio module was certified in a portable configuration, the end-product does not require SAR testing assuming it is not located within 20 cm of another transmitter R1.2 Copyright 2013 LS Research, LLC Page 25 of 26 9 Contacting LS Research Headquarters Website Wiki Technical Support Sales Contact LS Research, LLC W66 N220 Commerce Court Cedarburg, WI USA Tel: 1(262) Fax: 1(262) The information in this document is provided in connection with LS Research (hereafter referred to as LSR ) products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of LSR products. EXCEPT AS SET FORTH IN LSR S TERMS AND CONDITIONS OF SALE LOCATED ON LSR S WEB SITE, LSR ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL LSR BE LIABLE FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF LSR HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. LSR makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. LSR does not make any commitment to update the information contained herein. Unless specifically provided otherwise, LSR products are not suitable for, and shall not be used in, automotive applications. LSR s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life R1.2 Copyright 2013 LS Research, LLC Page 26 of 26
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