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On-Board Antenna Configuration

10

SWRU359E – September 2013 – Revised September 2015

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Copyright © 2013–2015, Texas Instruments Incorporated

WL1835MODCOM8B WLAN MIMO and Bluetooth

®

Module EVM

6

On-Board Antenna Configuration

6.1

VSWR

shows the antenna VSWR.

Figure 4. Antenna VSWR

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Summary of Contents for WL1835MODCOM8B

Page 1: ...enefits 5 3 Board Pin Assignment 6 3 1 Pin Descriptions 7 4 Electrical Characteristics 9 5 Approved Antenna Types and Maximum Gain Values 9 6 On Board Antenna Configuration 10 6 1 VSWR 10 6 2 Efficiency 11 6 3 Radio Pattern 11 6 4 ANT1 12 6 5 ANT2 13 7 Circuit Design 15 7 1 Schematic 15 7 2 Bill of Materials BOM 16 8 Layout Guidelines 17 8 1 Board Layout 17 List of Figures 1 WL1835MODCOM8B Top Vie...

Page 2: ... Radio Module of the EVM For evaluation only not FCC approved for resale This kit is designed to allow 1 Product developers to evaluate electronic components circuitry or software associated with the kit to determine whether to incorporate such items in a finished product 2 Software developers to write software applications for use with the end product This kit is not a finished product and when a...

Page 3: ...uments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM 2 Introduction The WL1835MODCOM8B device is a Wi Fi MIMO Bluetooth and Bluetooth Low Energy BLE module board with the TI WL18MODGB module WL18MODGB is built in TI WL1835 IEEE 802 11 b g n and Bluetooth 4 0 solutions to provide the best Wi Fi and Bluetooth coexistence interoperability and power saving technologies from TI Figure ...

Page 4: ...pyright 2013 2015 Texas Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM continued 2 1 Features WLAN Bluetooth BLE on a module board 100 pin board card Dimension 76 0 mm L x 31 0 mm W WLAN 2 4 GHz SISO 20 and 40 MHz channels 2 4 GHz MIMO 20 MHz channels Support for BLE dual mode Seamless integration with TI Sitara and other application processors Design for TI AM335X gene...

Page 5: ...tering Video Conferencing Video Camera and Security 2 3 TI Module Key Benefits Reduces Design Overhead Single WiLink8 Module Scales Across Wi Fi and Bluetooth WLAN High Throughput 80 Mbps TCP 100 Mbps UDP Bluetooth 4 0 BLE Smart Ready Wi Fi Bluetooth Single Antenna Coexistence Low Power 30 50 Less than Previous Generation Available as Easy to Use FCC ETSI and Telec Certified Module Lower Manufactu...

Page 6: ...WRU359E September 2013 Revised September 2015 Submit Documentation Feedback Copyright 2013 2015 Texas Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM 3 Board Pin Assignment Figure 2 Board Top View Figure 3 Board Bottom View ...

Page 7: ...C No connection 15 WL_UART_DBG O WLAN Logger output 16 N C No connection 17 N C No connection 18 GND G Ground 19 GND G Ground 20 SDIO_CLK I WLAN SDIO clock 21 N C No connection 22 GND G Ground 23 N C No connection 24 SDIO_CMD I O WLAN SDIO command 25 N C No connection 26 SDIO_D0 I O WLAN SDIO data bit 0 27 N C No connection 28 SDIO_D1 I O WLAN SDIO data bit 1 29 N C No connection 30 SDIO_D2 I O WL...

Page 8: ...ion 66 BT_UART_IF_TX O Bluetooth HCI UART transmit output 67 N C No connection 68 BT_UART_IF_RX I Bluetooth HCI UART receive input 69 N C No connection 70 BT_UART_IF_CTS I Bluetooth HCI UART Clear to Send input 71 N C No connection 72 BT_UART_IF_RTS O Bluetooth HCI UART Request to Send output 73 N C No connection 74 BT_FUNC1 O BT_HOST_WAKE_UP Signal to wake up the host from Bluetooth 75 N C No con...

Page 9: ...na Operate the radio transmitter using only an antenna of a type and maximum or lesser gain approved by TI Table 1 lists the antennas approved by TI for use with the radio transmitter along with maximum allowable gain values Antenna types not included in the list or having a gain greater than the maximum indicated are strictly prohibited for use with this transmitter Table 1 Approved Antenna Types...

Page 10: ...ember 2013 Revised September 2015 Submit Documentation Feedback Copyright 2013 2015 Texas Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM 6 On Board Antenna Configuration 6 1 VSWR Figure 4 shows the antenna VSWR Figure 4 Antenna VSWR ...

Page 11: ...umentation Feedback Copyright 2013 2015 Texas Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM 6 2 Efficiency Figure 5 shows the antenna efficiency Figure 5 Antenna Efficiency 6 3 Radio Pattern Figure 6 shows the radio pattern of the WL1835MODCOM8B device Figure 6 Radio Pattern ...

Page 12: ...d September 2015 Submit Documentation Feedback Copyright 2013 2015 Texas Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM 6 4 ANT1 Figure 7 shows the ANT1 polarization of the WL1835MODCOM8B device Figure 7 ANT1 Polarization Figure 8 ANT1 Polarization ...

Page 13: ... September 2015 Submit Documentation Feedback Copyright 2013 2015 Texas Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM Figure 9 ANT1 Polarization 6 5 ANT2 Figure 10 shows the ANT2 polarization of the WL1835MODCOM8B device Figure 10 ANT2 Polarization ...

Page 14: ...com 14 SWRU359E September 2013 Revised September 2015 Submit Documentation Feedback Copyright 2013 2015 Texas Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM Figure 11 ANT2 Polarization Figure 12 ANT2 Polarization ...

Page 15: ... 1 R2 0R 0402 0R R21 0402 TP6 1 0R R19 0402 OSC1 1V8 32 768kHz OSC 3 2X2 5 EN 1 VCC 4 OUT 3 GND 2 R6 0R 0402 R3 0R 0402 R16 0R 0402 U1 WL1835MODGB E 13 4X13 3 N100_0 75 TOP GPIO9 3 GPIO12 5 GPIO11 2 GPIO10 4 GND 17 VIO 38 VBAT 47 EXT_32K 36 BT_AUD_FSYNC 58 BT_AUD_IN 56 BT_AUD_OUT 57 BT_AUD_CLK 60 WL_SDIO_D2 12 WL_SDIO_CLK 8 WL_SDIO_D3 13 WL_SDIO_D0 10 WL_SDIO_D1 11 WL_SDIO_CMD 6 BT_HCI_RTS 50 BT_H...

Page 16: ...ni RF Header Receptacle U FL R SMT 1 10 J5 J6 7 IND 0402 1 1 nH 0 05 nH SMD LQP15MN1N1W02 L1 8 IND 0402 1 5 nH 0 05 nH SMD LQP15MN1N5W02 L2 9 CAP 0402 1 2 pF 50 V C0G 0 1 pF GJM1555C1H1R2BB01 C11 10 CAP 0402 2 2 pF 50 V C0G 0 1 pF GJM1555C1H2R2BB01 C9 11 CAP 0402 4 pF 50 V C0G 0 1 pF GJM1555C1H4R0BB01 C14 12 CAP 0402 8 pF 50 V C0G 0 1 pF GJM1555C1H8R0BB01 C13 13 CAP 0402 10 pF 50 V NPO 5 0402N100J...

Page 17: ...ht 2013 2015 Texas Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM 8 Layout Guidelines 8 1 Board Layout Figure 14 shows the WL1835MODCOM8B 4 layer board Table 3 Figure 15 Figure 16 Figure 17 Figure 18 and Figure 19 show instances of good layout practices Figure 14 Layer 1 Figure 15 Layer 2 ...

Page 18: ...nd vias must be close to the pad 2 Signal traces must not be run underneath the module on the layer where the module is mounted 3 Have a complete ground pour in layer 2 for thermal dissipation 4 Have a solid ground plane and ground vias under the module for stable system and thermal dissipation 5 Increase the ground pour in the first layer and have all of the traces from the first layer on the inn...

Page 19: ...as Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM Figure 18 Module Layout Guidelines Top Layer Figure 19 Module Layout Guidelines Bottom Layer Figure 20 shows the trace design for the PCB A 50 Ω impedance match on the trace to the antenna should be used Also 50 Ω traces are recommended for the PCB layout ...

Page 20: ... be as short as possible beyond the ground reference At this point the trace starts to radiate 2 The RF trace bends must be gradual with an approximate maximum bend of 45 degrees with trace mitered RF traces must not have sharp corners 3 RF traces must have via stitching on the ground plane beside the RF trace on both sides 4 RF traces must have constant impedance microstrip transmission line 5 Fo...

Page 21: ...r 2015 Submit Documentation Feedback Copyright 2013 2015 Texas Instruments Incorporated WL1835MODCOM8B WLAN MIMO and Bluetooth Module EVM Figure 22 Top Layer Antenna and RF Trace Routing Layout Guidelines Figure 23 Bottom Layer Antenna and RF Trace Routing Layout Guidelines ...

Page 22: ...ed inductance and trace resistance If possible shield VBAT traces with ground above below and beside the traces The digital signal routing guidelines are as follows Route SDIO signal traces CLK CMD D0 D1 D2 and D3 in parallel to each other and as short as possible less than 12 cm In addition each trace must be the same length Ensure enough space between traces greater than 1 5 times the trace widt...

Page 23: ...n History Revision History NOTE Page numbers for previous revisions may differ from page numbers in the current version Changes from C Revision March 2015 to E Revision Page Changed from 40 2 Added Approved Antenna Types and Maximum Gain Values section from SWRU382A 9 Changed section title from Antenna Characteristics 10 Replaced digital signal routing guidelines 22 ...

Page 24: ... TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right or other intellectual property right relating to any combination machine or process in which TI product...

Page 25: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments WL1835MODCOM8B ...

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