DLA.01

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**Part No: DLA.01** 

**Description** 

DECT 1880-1930MHz Ceramic Substrate Loop Antenna 

**Features:** 

- Compact, Low Profile SMD Antenna 

- Designed for Digital Enhanced Cordless Telecommunications (DECT) 

- Covering 1880 - 1930MHz 

- High efficiency, omnidirectional coverage 

- Dims: 5mm x 3mm x 0.5mm 

- RoHS & Reach Compliant 

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1. Introduction  3<br>2. Specification  4<br>3. Mechanical Drawing  5<br>4. Packaging  6<br>5. Antenna Integration Guide  7<br>6. Solder Reflow Profile  15<br>7. Antenna Characteristics  16<br>8. Radiation Patterns  20<br>Changelog  22<br>**----- End of picture text -----**<br>


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. 

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Taoglas has developed a unique ceramic miniature loop antenna series for Digital Enhanced Cordless Telecommunications (DECT) applications. At 5.0 x 3.0 x 0.5mm, the DLA.01 DECT ceramic loop antenna is a miniature edge mounted antenna designed for compact devices with minimal space availability. The radiation pattern of the loop antenna is more omni-directional than traditional patch antennas making it ideal for use where the orientation of the device is not known, of could change whilst the device is in use. 

Mechanically, the DLA.01 at only 0.5mm in height has a low profile, and with a footprint of overall footprint including the keep out area of just 6.0 x 5.5mm, it requires less space on the device PCB when compared to larger patch style antennas. Based on the loop effect, this antenna works best when positioned in the center of the edge of the board, but it can still work better than traditional linear polarized chip antennas even when placed at the corner of the PCB as a substitute if restrictions apply elsewhere. 

This antenna can be mounted with no performance degradation in either orientation if the antenna is soldered correctly via surface mounting. Please see the integration instructions section for further detail regarding the optimum way to integrate this antenna into your device. 

Typical Applications for the DLA.01 include: 

- Cordless Device Communication, eg. Handsets and Personal Alarms 

- Indoor Location Tracking 

- Smart Home and Industrial Automation and Monitoring 

The DLA.01 is delivered on tape and reel and now allows customers to integrate using automated pick-andplace machines during high-speed SMT production. For further optimization to customer-specific device environments and for support to integrate and test this antennas performance in your device, contact your regional Taoglas Customer Services Team. 

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|**Electrical**|**Electrical**|**Electrical**|**Electrical**|**Electrical**|**Electrical**|**Electrical**|**Electrical**|**Electrical**|
|---|---|---|---|---|---|---|---|---|
|**Band**|Frequency<br>(MHz)|Efficiency<br>(%)|Average Gain<br>(dB)|Peak Gain<br>(dBi)|Impedance|Polarization|Radiation<br>Pattern|Max. input<br>power|
|**DECT**|1880-1930|63.5|-1.97|2.58|50 Ω|Linear|Omni<br>directional|10W|



## **Mechanical** 

||**Mechanical**|
|---|---|
|**Dimensions**|5mm x 3mm x 0.5mm|
|**Material**|Ceramic|
|**Mounting**|SMT|



|**Environmental**|**Environmental**|
|---|---|
|**Operation Temperature**|-40°C to 85°C|
|**Storage Temperature**|-40°C to 105°C|
|**Temperature Coefficient**（τ**f)**|0 ± 20 ppm @-20ºC to +80ºC|
|**Recommended Reel Storage Condition**|5°C to 40°C Relative Humidity 20% to 70%|
|**Moisture Sensitivity (MSL)**|Level 3 (168 Hours)|



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6000pcs DLA.01 per Tape and Reel Dimensions: Ø330 x 60mm 

|(—~/_\aV—)| 

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The following is an example on how to integrate the DLA.01 into a design. This antenna has 3 pins, where one pin is used for the RF Feed. Taoglas recommends using a minimum of 80x40mm ground plane (PCB) to ensure optimal performance. 

The antenna should be placed mid-point on the long side of the PCB to take advantage of the ground plane on each side of the antenna. 

Top view of PCB. 

Detail view of antenna and components on board. 

Please find the Integration files in Altium, 2D formats and the 3D model for the DLA.01 here: https://www.taoglas.com/product/dect-ntn-n256-1880-2200mhz-ceramic-substrate-loopantenna/ 

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## **5.1** Schematic and Symbol Definition ay 

Above is a 3D model of the DLA.01 on a PCB. 

The circuit symbol for the DLA.01 is shown below. The antenna has 3 pins as indicated below. 

|Pin<br>~~ee~~|Description|
|---|---|
|1<br>~~ee~~|RF Feed|
|2|Ground|
|3|Fine Tuning Element|



Above is a schematic symbol of DLA.01 and a table of the pin definitions. 

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## Antenna Footprint 

|Pin|Description|
|---|---|
|1|RF Feed|
|2|Ground|
|3|Fine Tuning Element|



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## **5.3** Top Solder Paste eas 

## **5.4** Top Solder Mask nes 

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## **5.5** Copper Clearance for DLA.01 need 

The footprint and clearance on the PCB must comply with the antenna’s specification. The PCB layout shown in the diagrams below demonstrates the DLA.01 clearance area. The copper keep-out area applies to all layers on the PCB. 

The copper clearance area extends to 7.1mm in length and 5.5mm in width around the antenna. The PCB edge clearance should be a minimum of 0.1mm, example below is 0.2mm. 

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## **5.6** Schematic Layout = 

Matching components with the DLA.01 are required for the antenna to have optimal performance in the spaces specified in the schematic below. Additional matching components may be necessary for your device, Taoglas recommends incorporating extra component footprints, forming a “pi” network, for the DLA.01. 

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TAOGLAS_DLA.01<br>ANT1<br>C3<br>R1<br>Transmission Line GND<br>0<br>2pF<br>—<br>GND<br>C2 C1<br>DNF 2.2pF<br>GND GND<br>GND FTE<br>1 2 3<br>**----- End of picture text -----**<br>


|Designator<br>~~eee~~|Type<br>~~eee~~|Value<br>~~eee~~|Manufacturer<br>~~eee~~|Manufacturer Part Number<br>~~eee~~|
|---|---|---|---|---|
|C1<br>~~eee~~|Capacitor<br>~~eee~~|2.2pF<br>~~eee~~|Murata<br>~~eee ~~|GRM1555C1H2R2CA01D<br> ~~eee~~|
|C2|Not Fitted|-|-|-|
|C3|Capacitor|2.0pF|Murata|GJM1555C1H2R0WB01D|
|R1|Resistor|0 Ohm|YAGEO|RC0402JR-070RL|



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## Antenna Integration 

The DLA.01 should be placed mid-point on the long side of the PCB to take advantage of the ground plane extending from each side of the antenna. 

The RF trace must maintain a 50 Ohm transmission line. A “Pi” Matching Network is recommended for the RF transmission line, the values and components for the matching circuit will depend on the tuning needed. Ground vias should be placed around the transmission line and the copper clearance area. 

DLA.01 antenna mounted on a PCB, showing “Pi” matching network. 

DLA.01 antenna mounted on a PCB, showing transmission line and integration notes. 

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## Final Integration 

The top side image shown below highlights the antenna transmission line. Taoglas recommends using a minimum of 80x40mm ground plane (PCB) to ensure optimal performance. 

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Top Side (DLA.01 placement on 80x40mm PCB) 

Bottom Side (80x40mm PCB) 

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The DLA.01 can be assembled by following the recommended soldering temperatures are as follows: 

*Temperatures listed within a tolerance of +/- 10º C 

Smaller components are typically mounted on the first pass, however, we do advise mounting the DLA.01 when placing larger components on the board during subsequent reflows. 

Note: Soldering flux classified ROL0 under IPC J-STD-004 is recommended. 

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## Test Setup 

VNA Test Set-up 

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## Return Loss 

## VSWR 

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## Efficiency 

## Average Gain 

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## Peak gain 

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## Test Setup 

Chamber Test Set-up 

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## Radiation Patterns at 1900 MHz 

## XZ Plane 

## YZ Plane 

## XY Plane 

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Changelog for the datasheet **SPE-25-8-067 – DLA.01** 

**Revision: A (Original First Release)** 

Date: 2025-03-05 Notes: Initial Release. Author: Gary West 

**Previous Revisions** 

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