2450AT42E0100E

High Frequency Ceramic Solutions P/N 2450AT42E0100 2.4 GHz SMD, Above Metal, Low Profile Mini Chip Antenna This antenna will generally have a metal layer directly underneath for proper operation, exceptions may apply. Detail Specification: Page 1 of 8 10/28/2021 General Specifications Part Number Frequency (MHz) Peak Gain (dBi typ.) Average Gain (dBi typ.) Return Loss (dB) Impedance (Ω) Power Capacity (W) Reel Quantity (pcs./reel) Operating Temp 2450AT42E0100 2400 - 2480 -2.0 (YZ-V) -5.0 (YZ-V) 5.6 typ. (4.5 min.) 50 2 max. (CW) 2,000 -40 to +85°C +5°C to +35°C Humidity 45 - 75% RH 18 months max. Recommended Storage Conditions and Period for unused Product on T&R Antenna mounts directly above or below the metal layer of PCB. No antenna clearance required ever again! Total average radiated efficiency on PCB feature on "Mounting Considerations 1" ( orderable EVB p/n: 2450AT42E0100-EB1SMA) is ~30% This antenna was designed in mind for small coin cell, wearable, IoT, 2.4 BLE, 802.11, ISM, Zigbee, etc. applications in close-range networks where metal or a battery/display covers the entire length or side of the PCB or encasement must be present directly under the antenna and there's no room for usual/typical antenna metal clearance. This antenna is specifically designed for PCBs that have 0.5-1mm of total thickness Part Number Explanation P/N Suffix Suffix = S E.g. 2450AT42E0100S Bulk (loose pcs.) T&R Suffix = E E.g. 2450AT42E0100E 2450AT42E0100-EB1SMA (comes with 1 female SMA connector) Packing Style Evaluation Board Mechanical Specifications L W T a b C 0.197 0.079 0.059 0.020 0.059 0.012 In ± 0.008 ± 0.008 ± 0.008 ± 0.008 ± 0.008 max Terminal Configuration mm 5.00 ± 0.20 2.00 ± 0.20 1.50 ± 0.20 0.50 ± 0.20 1.50 ± 0.20 0.30 max W c L Top View b T b a NC1 GND GND     1 Bottom View Side View Feeding Point 1 2 3 4 Make sure to have Pin 2 soldered to its PCB land pad but not connected to GND or input, it must be NC (or floating). Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 4.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions P/N 2450AT42E0100 2.4 GHz SMD, Above Metal, Low Profile Mini Chip Antenna This antenna will generally have a metal layer directly underneath for proper operation, exceptions may apply. Page 2 of 8 10/28/2021 Detail Specification: Mounting Considerations 1 Top View Bottom View 3mm Ground 6.26mm Matching circuit 30mm 50Ω Feed Line Ground Plane (where other SMD components will be mounted) p/n: 2450AT42E0100-EB1SMA 50mm Want the layout file? Send us a message at: https://www.johansontechnology.com/ask-a-question Metal bottom GND plane to be placed directly underneath yellow soldemask zone, covering entire area. 0.63mm 1.5mm 2mm 1.5mm 0.63mm 0.3mm   3.3 nH 1.0mm 2.0 pF * 0.6mm  1.5 nH  3mm 0.6mm 0.5mm 6.26mm Floating pad Matching circuit *Line width should be designed to match 50ohm characteristic impedance, depending on PCB material and thickness. A coplanar waveguide trace is recommended for best results. For this particular antenna It is recommended that the designer leave available slots for the matching network, even if all slots won't be used, this will prepare the PCB for the unpredictable final mass production version of the matching circuit. The antenna matching network values above are used when antenna is mounted on Johanson's evaluation board. The matching values on client’s PCB will be different. To order a pre-tuned 50Ω EVB with a female SMA connector you see here Click here: https://www.johansontechnology.com/request-a-sample Reference p/n: 2450AT42E0100-EB1SMA Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 4.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions P/N 2450AT42E0100 2.4 GHz SMD, Above Metal, Low Profile Mini Chip Antenna This antenna will generally have a metal layer directly underneath for proper operation, exceptions may apply. Page 3 of 8 10/28/2021 Detail Specification: Typical Electrical Characteristics (T=25 °C) Return Loss 0 m122 m123 dB(S(1,1)) -5 -10 m118 -15 -20 2.0 2.2 2.4 2.6 2.8 3.0 freq, GHz m122 m123 m118 freq=2.400GHz freq=2.480GHz freq=2.440GHz dB(S(1,1))=-5.691 dB(S(1,1))=-11.343 dB(S(1,1))=-5.746 The designer should not be highly concerned of the fact that the antenna only demonstrates a -5dB S11 level at the band edges. The antenna has sufficient gain at the band edges to satisfy the applications and uses a high dielectric constant ceramic giving it some detuning resilience to capacitivel loading effects. This antenna is designed for close proximity applications such as the ones mentioned on page 1. Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 4.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions 2.4 GHz SMD, Above Metal, Low Profile Mini Chip Antenna P/N 2450AT42E0100 This antenna will generally have a metal layer directly underneath for proper operation, exceptions may apply. Detail Specification: Page 4 of 8 10/28/2021 Typical Radiation Patterns @ 2.44GHz (T=25 °C) Y :Φ(Phi)=90° XY-plane @2440MHz Total X :Φ(Phi)=0° Z : θ(Theta)=0° XZ-plane @2440MHz Total YZ-plane @2440MHz Total Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 4.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions P/N 2450AT42E0100 2.4 GHz SMD, Above Metal, Low Profile Mini Chip Antenna This antenna will generally have a metal layer directly underneath for proper operation, exceptions may apply. Detail Specification: Page 5 of 8 10/28/2021 Mounting Considerations 2 - Circular PCB Environments (coin cell type) Top View 0.63mm 1.5mm 2mm 1.5mm 0.63mm 0.3mm 0.6mm 1.0mm Matching circuit 0.6mm 0.5mm 50Ω Feed Line radius=22mm (reference only) Ground Receding the GND plane may sound counterintuitive, but this helps shape the radiation pattern in a more isometric (spherical) shape. We recommend the designer do this of he/she can afford the reduce SMT space, but not mandated. ) 31.7mm 7mm Bottom View 0.3mm 6.26mm radius=22mm Ground Want the layout file? Send us a message at: https://www.johansontechnology.com/ask-a-question 31.7mm 7mm Note: There's no orderable EVB available for the above "Mounting Considerations 2" reference design Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 4.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions P/N 2450AT42E0100 2.4 GHz SMD, Above Metal, Low Profile Mini Chip Antenna This antenna will generally have a metal layer directly underneath for proper operation, exceptions may apply. Detail Specification: Page 6 of 8 10/28/2021 Mounting Considerations 3 - Recommendations when using 2450AT42E010B We have found that the best performance can be gained when using the 2450AT42E010B with a 4layer PCB with a total thickness approximately 1.5mm thick. 50mm 3mm Ground 6.26mm Matching circuit 30mm 50Ω Feed Line 2450AT42E010B evaluation board (PN 2450AT42E010B-EB1SMA) Want the layout file? Send us a message at: https://www.johansontechnology.com/ask-a-question The 2450AT42E010B 4-layer evaluation board has the following stackup: 6 mil 41 mil To order a pre-tuned 50Ω EVB with a female SMA connector, click here: https://www.johansontechnology.com/request-a-sample Reference p/n: 2450AT42E010B-EB1SMA 6 mil Johanson Technology, Inc. reserves the right to make design changes without notice. All sales are subject to Johanson Technology, Inc. terms and conditions. https://www.johansontechnology.com 4001 Calle Tecate • Camarillo, CA 93012 • TEL 805.389.1166 FAX 805.389.1821 Ver. 4.0 2021 Johanson Technology, Inc. All Rights Reserved High Frequency Ceramic Solutions P/N 2450AT42E0100 2.4 GHz SMD, Above Metal, Low Profile Mini Chip Antenna This antenna will generally have a metal layer directly underneath for proper operation, exceptions may apply. Detail Specification: Page 7 of 8 10/28/2021 How To Choose The Correct Antenna Variant Since the antenna's efficiency is largely affected by the thickness of the PCB's substrate, we offer another variant of this antenna. This allows a more robist design to fit your PCB. The disparity between antenna variations are internal only; variations are identical in dimension and footprint-compatible. Refer to the diagram below to understand what is meant by substrate thickness. *Substrate Thickness (H) *For PCBs consisting of multiple layers, the thickness (H) is limited distance between the metal layer immediately below the antenna. PCB Substrate Thickness Recommended JTI PN ≤ 1.0mm 2450AT42E0100 1.0mm - 2.0mm 2450AT42E010B Typical Efficiency Values @ 2.44GHz for various scenarios for a 30x50mm PCB The following efficiency values represent performance on a 30x50mm EVB like on page 2. Please note that antenna efficiency varies widely with board layout, size and surroundings. PCB Substrate Thickness (H) Antenna Efficiency @ 2.44GHz 2450AT42E0100 2450AT42E010B H = 0.12 mm 1.95% 1.02% H = 0.7 mm 29.20% 9.30% H = 1.5 mm 23.30% 38.00% H = 2.5 mm 21.60% 42.00% Note: "H" substrate thickness of