Antenna Info

FCC ID: 2AF78-01046

Operational Description

Download: PDF
FCCID_4286811

APPLICATION SPECIFICATION 2.4 GHZ SMD ON-GROUND ANTENNA 1.0 SCOPE This specification describes the antenna application and recommended PCB layout for the Molex 2.4 GHz SMD On-Ground Antenna. The information in this document is for reference and benchmark purposes only. The user is responsible for validating antenna RF performance based on users own PCB and matching circuits. All measurements are done of the antenna mounted on the recommended PCB with VNA Agilent 5071C and OTA chamber. Antenna illustrations in this document are generic representations. They are not intended to be an image of any antenna listed in the scope. 2.0 PRODUCT DESCRIPTION A. DEFINITIONS OF TERMS I. ANTENNA DESCRIPTION The antenna design is based on carrier size 3mm × 3mm × 4mm. There is 1 feeding pad, 3 fixing pads and antenna radiator. See figure 1. 1. FEEDING PAD SMD mounted to feeding pad on PCB. The signal from the transmission line must feed into the feeding pad on the PCB. 2. FIXING PAD SMD mounted to dummy pads on PCB. Anchoring the antenna to the PCB 3. ANTENNA RADIATOR To act as a transducer that converts unguided electromagnetic wave to guided electromagnetic wave and vice versa. 4. PICK AND PLACE FEATURE To enable the antenna to be picked up by SMT machine pick up nozzle. Fixing Pad Fixing Pad Feeding Pick & Place feature Pad Antenna Radiator Fixing Pad Antenna Housing Figure 1: 2.4GHZ SMD On-Ground Antenna REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 1 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION B. RF SPECIFICATION OF REFERENCE IMPLEMENTATION DESCRIPTION TEST CONDITION REQUIREMENT Measure antenna on T Frequency Range recommended PCB through VNA 2400MHz-2483.5MHz E5071C Measure antenna on Return Loss recommended PCB through VNA < -7 dB E5071C Measure antenna on Peak Gain recommended PCB through OTA 3.0dBi chamber Measure antenna on Avg. Total recommended PCB through OTA Average 70% Efficiency chamber A Measure antenna through the Polarization Linear OTA chamber Measure antenna on Input Impedance recommended PCB through VNA 50Ohms E5071C TABLE 1: Antenna Specification Using Reference Board 3.0 PROCEDURE 3.1 GENERAL REQUIREMENTS A. REFERENCE IMPLEMENTATION I. REFERENCE PCB DESCRIPTION The reference design is based on a recommended double sided PCB size of 100 mm x 40 mm x 1 mm. There is 1 feeding pad, 3 fixing pads, and there is a signal matching network near to feeding pad. See figure 2 and 3. 1. FEEDING PAD The signal from transmission line must feed into the feeding pad. 2. MATCHING CIRCUIT Recommended to reserve PCB space for a matching circuit in case it should be needed to adjust the return loss due to loading by the devise housing and surrounding components. REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 2 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION II. REFERENCE PCB LAYOUT Feeding Pad Fixing Pad Matching Circuit Distance between fixing pad and ground : 1mm FIGURE 2: RECOMMENDED PCB LAYOUT Note: PCB size of 100 mm x 40 mm REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 3 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION III. REFERENCE ANTENNA LOCATION Figure 3 IV. MATCHING NETWORK DESRICPTION A matching circuit is needed if the resonance frequency needs adjustment due to loading by the device housing and surrounding components effect. A series inductor and a shunt capacitor will shift the frequency downward about 50MHz. See figure 4. REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 4 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION Figure 4 REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 5 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION V. RF PERFORMANCE AS A FUNCTION OF IMPLEMENTATION 1. ANTENNA RF PERFORMANCE AS A FUNCTION OF LOCATION ON THE PCB 4 locations have been evaluated, and these locations are show in figure 5(The matching is the same as Location 1). The location which gives the best RF performance is location 1. Location 1 (corner location) is the recommended location for the antenna. Figure 5 REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 6 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION Figure 6: Return loss of comparison of different location on PCB Figure 7: Total efficiency of comparison of different location on PCB REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 7 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION 2. ANTENNA RF PERFORMANCE AS AN EFFECT OF NEARBY SHIELDING CAN An evaluation was done with 3 different distances from the antenna which located at the recommended location. The 3 distances is as follow: 1mm, 3mm and 5mm. From the study, we can say that the minimum distance a shielding can (30mm x 30mm x 2mmm) should be placed from the antenna is 5mm. At distances less than 5mm the antenna performance will be significantly degraded. Refer to figure 8, 9 and 10. Shielding can: 30x30x2 (mm) Figure 8 REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 8 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION Figure 9: Return loss comparison of shielding can distance from antenna Figure 10: Total efficiency comparison of shielding can distance from antenna REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 9 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION 3. RF PERFORMANCE AS AN EFFECT OF NEARBY BATTERY An evaluation was done with 3 different distances from the antenna which located at the recommended location. The 3 distances is as follow: 1mm, 3mm and 5mm. From the study, we can say that the minimum distance a battery (30mm x 60mm x 3mmm) should be placed from the antenna is 5mm. At distances less than 5mm the antenna performance will be degraded significantly. Refer to figure 11, 12 and 13. Battery: 30x60x3 (mm) Figure 11 REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 10 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION Figure 12: Return loss comparison of battery distance from antenna Figure 13: Total efficiency comparison of battery distance from antenna REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 11 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION 4. RADIATION PATTERN Figure 14: Radiation Pattern of antenna at 2.45GHz at Free space REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 12 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION 3.2 ASSEMBLY INSTRUCTIONS A. RECOMMENDED SMT REFLOW PROFILE Figure 15 B. MECHANICAL INTERFACE I. GENERAL DESCRIPTION The overall antenna size is 3mm × 3mm × 4mm Figure 16 REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 13 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC

APPLICATION SPECIFICATION II. STRUCTURE FUNCTIONAL DESCRIPTION Figure 17 Figure 18: Footprint on PCB for soldering REVISION: ECR/ECN INFORMATION: TITLE: SHEET No. EC No: ABU2016-0022 2.4 GHz SMD On Ground Antenna C DATE: 2015 / 8 / 28 Application Specification 14 of 14 DOCUMENT NUMBER: CREATED / REVISED BY: CHECKED BY: APPROVED BY: AS-47948-001 Benson Liu Ryan Liu Welson Tan TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC


Document Created: 2015-09-24 21:03:51
Document Modified: 2015-09-24 21:03:51
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC