Texas Instruments WL1835MODCOM8A User Manual Download Page 11 | Manualshive

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Antenna Characteristics

5.1.1

ANT1

Figure 7

shows the ANT1 polarization of the WL1835MODCOM8A device.

Figure 7.

Figure 8.

11

SWRU359A – September 2013 – Revised October 2013

WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI

Sitara™ Platform

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Copyright © 2013, Texas Instruments Incorporated

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Summary of Contents for WL1835MODCOM8A

Page 1: ...WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI Sitara Platform User s Guide Literature Number SWRU359A September 2013 Revised October 2013 ...

Page 2: ...teristics 9 4 Antenna Characteristics 9 4 1 VSWR 9 4 2 Efficiency 10 5 Antenna Characteristics 10 5 1 Radio Pattern 10 6 Circuit Design 14 6 1 Schematic 14 6 2 Bill of Materials BOM 15 7 Layout Guidelines 16 7 1 Board Layout 16 2 Table of Contents SWRU359A September 2013 Revised October 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 3: ...cific data sheets and user s guides For the most up to date version of the user s guide and data sheets go to http www ti com product wl1835mod Warning The WL1835MODCOM8A board is tested to comply with ETSI R TTE over temperatures from 0 to 70 C The WL1835MODCOM8A board is FCC and IC certified This board should not be modified to operate in other frequency bands other than what they are designed f...

Page 4: ...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 general purpose EVM WLAN and Bluetooth BLE cores are software and hardware compatible with prior WL127x WL128x and CC256x offerings for smooth migration to device Shared HCI transport for Bluetooth and BLE over UART and SDIO for WLAN WiFi Bluetooth single...

Page 5: ... 100 Mbps UDP Bluetooth 4 0 BLE Smart Ready WiFi Bluetooth Single Antenna Coexistence Low Power 30 50 Less than Previous Generation Available as Easy to Use FCC ETSI and Telec Certified Module Lower Manufacturing Costs Saving Board Space and Minimizing RF Expertise AM335x Linux and Android Reference Platform Accelerates Customer Development and Time to Market 5 SWRU359A September 2013 Revised Octo...

Page 6: ...t Figure 2 Board Top View Figure 3 Board Bottom View 6 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 7: ...d 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 WLAN SDIO data bit 2 31 N C No connection 32 SDIO_D3 I O WLAN SDIO data bit 3 33 N C No connection 34 WLAN_IRQ O WLAN SDIO interrupt out 35 N C No connection 36 N C No connection 37 GND G Groun...

Page 8: ...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 connection 76 BT_UART_DEBUG O Bluetooth Logger UART output 77 GND G Ground 78 GPIO9 I O General purpose I O 79 N C No connection 80 N C No connection 81 N C No connection 82 N C No connection 83...

Page 9: ...aracteristics Refer to the detailed data in the WL1835MODGA data sheet for electrical characteristics 4 Antenna Characteristics 4 1 VSWR Figure 4 shows the antenna VSWR Figure 4 Antenna VSWR 9 SWRU359A September 2013 Revised October 2013 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 10: ...5 Antenna Characteristics 5 1 Radio Pattern Figure 6 shows the radio pattern of the WL1835MODCOM8A device Figure 6 10 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 11: ...ANT1 polarization of the WL1835MODCOM8A device Figure 7 Figure 8 11 SWRU359A September 2013 Revised October 2013 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 12: ...hows the ANT2 polarization of the WL1835MODCOM8A device Figure 10 12 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 13: ...istics Figure 11 Figure 12 13 SWRU359A September 2013 Revised October 2013 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 14: ...1 GND G32 GND G33 GND G34 GND G35 GND 23 GND 59 GND 34 GND 29 GND 7 2G4_ANT2_W 18 GND 49 GND 9 GND 31 GND 35 GND 15 GND 55 GND 45 GND 44 GND 30 GND 24 GND 63 GND 61 GND 39 GND 33 GND 54 GND G36 C5 10pF 0402 C6 10pF 0402 C11 1 2pF 0402 C14 4pF 0402 C10 NU_0 3pF 0402 C9 2pF 0402 VBAT_IN VIO_IN BT_FUNC1 C4 0 1uF 0402 C3 0 1uF 0402 R4 0R 0402 J3 HEADER 1x2 H 1X2_2MM 1 2 SLOW_CLK TP2 1 TP8 1 R6 0R 0402...

Page 15: ...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 0402N100J500LT C7 C8 14 CAP 0402 0 1 µF 6 3 V X7R 10 0402B104K100CT C3 C4 15 CAP 0402 1 µF 6 3 V X5R 10 HF GRM155R60J105KE19D C1 16 CAP 0603 10 µF 6 3 V X5R 20 C1608X5R0J106M C2 R1 R2 R3 R4 R5 R6 R7 R8...

Page 16: ...re 15 Figure 16 Figure 17 Figure 18 and Figure 19 show instances of good layout practices Figure 14 Layer 1 Figure 15 Layer 2 16 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 17: ... 4 Have a solid ground plane and ground vias under the module for stable system and thermal dissipation Increase the ground pour in the first layer and have all of the traces from the first layer on the inner layers if 5 possible Signal traces can be run on a third layer under the solid ground layer which is below the module mounting 6 layer 17 SWRU359A September 2013 Revised October 2013 WL1835MO...

Page 18: ...race 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 18 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 19: ...red RF 2 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 For best results the RF trace ground layer must be the ground layer immediately below the RF trace The 5 ground layer must be solid 6 There must be no traces or ground under the antenna section RF...

Page 20: ...t Guidelines Figure 23 Bottom Layer Antenna and RF Trace Routing Layout Guidelines 20 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 21: ... and D3 should be routed in parallel to each other and as short as possible less than 12 cm In addition every trace length must be the same as the others There should be enough space between traces greater than 1 5 times the trace width or ground to ensure signal quality especially for the SDIO_CLK trace Remember to keep them away from the other digital or analog signal traces TI recommends adding...

Page 22: ...vision Date Description Changes Changed all references of the device name from SWRS359A October 2013 WL1835MODCOM8 to WL1835MODCOM8A NOTE Page numbers for previous revisions may differ from page numbers in the current version 22 Revision History SWRU359A September 2013 Revised October 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

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