Back Front DTAD.01.A.50 Specification Patent Pending Part No. DTAD.01.A.50 Product Name Compact Evaluation Boards for Evolution DTA.01.A Digital Tunable Antenna for 3G and 4G Cellular Applications Feature Complete Reference Design Increases antenna efficiency from ~7% to ~28% Perfect for smaller ground plane sizes down to 50x45 mm Enables better transmission and reception for 3G and 4G USB interface SMA(F) Connector for Antenna Measurement RoHS Compliant SPE-13-8-041/B/RC | page 1 of 24 1. Introduction The DTAD.01.A.50 is an evaluation board for Taoglas new patent pending series of Evolution DTA tunable antennas. DTA antennas deliver higher efficiency on smaller ground-plane than traditional passive antennas, enabling a new miniaturized generation of high performance wireless devices. Typical applications would be 3G On Board Diagnostic (OBDII) Devices in automotive, medical telemetry devices, 4G dongles, access points and routers. The board contains a surface-mount ceramic antenna DTA.01, a tunable capacitor PE64102 DuNE™ (32 state capacitance) from Peregrine Semiconductor and a matching circuit. Via a USB connection to the board, the antenna frequency response is shifted via a command from a PC with Peregrine supplied software and driver. The antenna parameters itself can be measured via the on-board SMA connector. A new generation of M2M devices with as little as a 50mm ground-plane in length can now achieve wide frequency coverage and higher data rates with bandwidth beating any passive antenna in the market with the same footprint and volume. The DTAD.01.A.50 board (60.50x45mm) with ground plane size of 50x45 mm can perform efficiently at a bandwidth from 698-960 MHz and from 1710-2170 MHz, covering all worldwide cellular 3G/4G bands in a tiny form factor. In combination with your device’s microprocessor it has the ability to dynamically improve the efficiency of a given antenna band in real time. Using a combination of the DTA.01 and the PE64102 we can cover the entire bandwidth for 3G and 4G cellular bands. Using the State 03 (2.58 pF) we can cover the 700/850/1800/1900 and 2100 MHz Band only and with the State 13 (6.52) pF we can cover a penta-band solution 850/900/1800/1900 and 2100 MHz. The optimal states will change depending on the ground-plane, device’s board and mechanical environment. Please download the Peregrine’s full set of support information. See our full links in the appendix at the end of the document. The DTAD01 board with a ground plane of 50x45 mm has not been designed with the intention of passing the cellular carrier’s minimum requirements. The integration is to achieve the maximum performance possible in the smallest form factor. SPE-13-8-041/B/RC | page 2 of 24 2. Specification Electrical State State 03 (2.58pF) Band (MHz) 700 850 900 1800 1900 2100 Return Loss (dB) -7 -11 -11 -13 -14 -8 Efficiency (%) 26 28 27 60 55 48 Average Gain (dB) -5.5 -5.3 -5.4 -2.2 -2.8 -2.9 Peak Gain (dBi) 1.3 1.8 1.8 2.5 2.5 2.2 Impedance 50Ω Ground Size 50x45 mm Board Size 60.50x45 mm Radiation Pattern Omni-Directional Input Power 26 dBm max State 13 (6.52pF) Mechanical Antenna Dimension 40x6x5 mm Board Dimension 60.50x45x1.57 mm Weight 20 g Connector SMA-Female * Based 50x45 mm ground plane size, on State 03 and State 13 respectively. SPE-13-8-041/B/RC | page 3 of 24 3. Antenna Setup Figure 1. Impedance Test X Y Z Figure 2. Over the air test SPE-13-8-041/B/RC | page 4 of 24 4. Antenna Parameters 4.1 Return Loss Figure 3. Return Loss of DTA.01 4.2 Efficiency Figure 4. Efficiency of the DTA.01 Antenna SPE-13-8-041/B/RC | page 5 of 24 4.3 Peak Gain Figure 5. Peak Gain of DTA.01 Antenna 4.4 Average Gain Figure 6. Average Gain of DTA.01 Antenna SPE-13-8-041/B/RC | page 6 of 24 5. Comparison Performance 5.1 Return Loss (dB) Figure 7. Return Loss Comparison of DTA.01 vs. PA.710 Antenna 5.2 Efficiency (%) Figure 8. Return Loss Comparison of DTA.01 vs. PA.710 Antenna SPE-13-8-041/B/RC | page 7 of 24 6. Antenna Radiation Patterns Figure 9. Radiation Pattern at 750 MHz, State 3. Figure 10. Radiation Pattern at 849 MHz, State 13. SPE-13-8-041/B/RC | page 8 of 24 6. Antenna Radiation Patterns Figure 11. Radiation Pattern at 915 MHz, State 13. Figure 12. Radiation Pattern at 1850 MHz, State 13. SPE-13-8-041/B/RC | page 9 of 24 6. Antenna Radiation Patterns Figure 13. Radiation Pattern at 1950 MHz, State 13. Figure 14. Radiation Pattern at 2140 MHz, State 13. SPE-13-8-041/B/RC | page 10 of 24 7. Matching Circuit The antenna matching for a ground plane of 50x50 mm is a combination of capacitors and inductors as follows; Antenna S1 S2 P1 S3 P2 S4 P3 DTC P4 L1 Ground Plane Figure 15. Antenna Matching Inductor Outside of Ground Plane L1= reserved for later use if required Series Elements S1 = 0 Ohm, S2 = 10 pF, S3 = 0.5 nH, S4 = 0.5 nH, Parallel Elements P1 = 47 nH, P2 = 6.2 nH, P3 = 1 pF, P4 = 3.9nH Figure 16. Lumped Component Spaces SPE-13-8-041/B/RC | page 11 of 24 8. Transmission Line Figure 17. Co-Planar Waveguide Follow the below transmission line dimensions for optimal performance. Dimensions W = 0.8 mm, G = 0.3 mm, H = 21 mils, T = 0.36 mm Dielectric Constant Er = 4.4 The dimension of the ground aside of the signal track (A), must be at least 3 times the width (W). For those cases where the transmission line have to be curved, bent or close to the board’s edge, the 3xW relation to each side of the signal track needs to be followed. the height from first middle layer (ground) to the top layer, must be 21 mils +/-1 10%. In order to maintain the proposed Co-Planar Waveguide (CPW) design, The computation of the above values gives an impedance of 49.83 ohms. SPE-13-8-041/B/RC | page 12 of 24 9. Drawings Figure 18. Board Size SPE-13-8-041/B/RC | page 13 of 24 Figure 19. Antenna Layout Figure 20. Solder area for the antenna SPE-13-8-041/B/RC | page 14 of 24 Figure 21. Bottom Layout At the bottom layer we need to add a portion of ground plane underneath the antenna, this portion measures 10x10.5 mm and is centered to the signal track of the transmission line at the top layers (5 mm to each side). SPE-13-8-041/B/RC | page 15 of 24 Figure 22. Recommended layout of the PE64102 For the solder pads of the PE64102 and the lumped components please check their respective specifications. We recommend 0402 size parts. (see the appendix) SPE-13-8-041/B/RC | page 16 of 24 10. Schematics Figure 23. USB interface and power supply Figure 24. USB to SPI Converter SPE-13-8-041/B/RC | page 17 of 24 Figure 25. Matching Circuit, PE64102 and DTA01 Antenna. SPE-13-8-041/B/RC | page 18 of 24 11. Gerbers Figure 26. DTA01 Top Layer (Ground-Components) SPE-13-8-041/B/RC | page 19 of 24 11. Gerbers Figure 27. DTA01 First Middle Layer (Ground-Signal) SPE-13-8-041/B/RC | page 20 of 24 11. Gerbers Figure 28. DTA01 Second Middle Layer (Ground-Signal-Power) SPE-13-8-041/B/RC | page 21 of 24 11. Gerbers Figure 29. DTA01 Bottom Layer (Ground-Components) SPE-13-8-041/B/RC | page 22 of 24 12. Bill of Materials Comment Pattern QTY Components Provider Provider Part Manufacturer Manufacturer Part 0.1pF Capacitor 0402 1 C1 Digikey 490-6259-2-ND Murata GRM1555C1HR10WA01D 1uF Capacitor 0402 2 C2, C6 Digikey 490-3890-1-ND Murata GRM155R61A105KE15D 10nF Capacitor 0402 2 C3, C7 Digikey 490-1312-1-ND Murata GRM155R71E103KA01D 10uF Capacitor 0603 1 C4 Digikey 490-3896-1-ND Murata GRM188R60J106ME47D 33pF Capacitor 0402 3 C5, C9, C10 Digikey 490-6177-1-ND Murata GRM1555C1E330JA01D 2.2uF Capacitor 0402 1 C8 Digikey 490-4518-1-ND Murata GRM155R60G225ME15D 100nF Capacitor 0402 1 C11 Digikey 490-1318-1-ND Murata GRM155R61A104KA01D 0 Ohm Resistor 0402 1 S1 Digikey P0.0JCT-ND Panasonic ERJ-2GE0R00X 10pF Capacitor 0402 1 S2 Digikey 490-5921-1-ND Murata GRM1555C1H100JA01D 0.5nH Inductor 0402 2 S3, S4 Digikey 445-6306-1-ND TDK MLG1005S0N5C 47nH Inductor 0402 1 P1 Digikey 490-6820-1-ND Murata LQW15AN47NH00D 6.2nH Inductor 0402 1 P2 Digikey 490-2620-1-ND Murata LQG15HS6N2S02D 1pF Capacitor 0402 1 P3 Digikey 490-3083-1-ND Murata GJM1555C1H1R0CB01D 3.9nH Inductor 0402 1 P4 Digikey 490-2617-1-ND Murata LQG15HS3N9S02D 5k Resistor 0603 2 R1, R2 Digikey RR08P4.99KDCT-ND Susumu RR0816P-4991-D-68H 570 Resistor 0603 1 R3 Digikey RR08P560DCT-ND Susumu RR0816P-561-D 100k Resistor 0402 1 R4 Digikey RR08P100KDCT-ND Susumu RR0816P-104-D Ferrite 0603 2 L3, L4 Digikey 490-5208-1-ND Murata BLM18BB470SN1D PE64102 SMT 1 U1 Digikey 1046-1066-1-ND Peregrine PE64102MLAA-Z IC_FT232RL 28-SSOP 1 U2 Digikey 768-1007-1-ND FTDI FT232RL-REEL LP2985AIM5-2.8 SOT-23-5 1 U3 Digikey LP2985AIM5-2.8/ NOPBCT-ND TI LP2985AIM5-2.8/NOPB LP2985AIM5-1.8 SOT-23-5 1 U4 Digikey LP2985AIM5-1.8/ NOPBCT-ND TI LP2985AIM5-1.8/NOPB LG Q971-KN-1 0603 1 D1 Digikey 475-1409-1-ND OSRAM LG Q971-KN-1 DLP11SN900HL2L 0504 1 DLP1 Mouser DLP11SN900HL2L Murata 81-DLP11SN900HL2L PA710.A SMT 1 Ant1 Digikey PA.720.A Taoglas PA.720.A SMA female Flange 1 Con1 Digikey 931-1179-ND Taoglas PCB.SMAFST.2H.B.HT USB A SINGLE SMT USB/SM 2.5-4H4 1 USB/CONN Mouser 855-M701-280442 Harwin M701-280442 SPE-13-8-041/B/RC | page 23 of 24 13. Appendix Product Overview Peregrine PE64102 http://www.psemi.com/pdf/sell_sheet-psg/73-0039.pdf Datasheet Peregrine PE64102 http://www.psemi.com/pdf/datasheets/PE64102_70-0428-01.pdf Application Note Peregrine PE64102 http://www.psemi.com/pdf/app_notes/an29.pdf Software and driver for the Peregrine PE64102 http://www.psemi.com/content/products/product.php?product=PE64102 Design Files for the DTAD01 http://taoglas.com/files/DTAD01-Design-Files.zip Software and Driver for the DTAD01 http://taoglas.com/files/DTAD01-Eval-Board-Software.zip Taoglas makes no warranties based on 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. Taoglas reserves all rights to this document and the information contained herein. Reproduction, use or disclosure to third parties without express permission is strictly prohibited. Copyright © Taoglas Ltd. SPE-13-8-041/B/RC | page 24 of 24