DSGP254B

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**Part No: DSGP254B** 

**Description** GPS L1 / GALILEO E1 / BEIDOU B1C 1575.42MHz SMD Ceramic Patch Antenna 

**Features:** 

SMD Mount Ceramic Patch Antenna GPS L1 / GALILEO E1 / BEIDOU B1C 1575.42 MHz Includes Additional Solder Mask Dimensions: 25 x 25 x 4mm RoHS & Reach Compliant 

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SPE-25-8-118-A 

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1. Introduction  3<br>2. Specification  4<br>3. Mechanical Drawing  6<br>4. Packaging  7<br>5. Antenna Integration Guide  8<br>6. Antenna Characteristics  15<br>7. Radiation Patterns  19<br>8. Solder Reflow Profile  21<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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The DSGP254B is a compact ceramic GPS L1 / GALILEO E1 / BEIDOU B1C 1575.42 MHz passive patch antenna, measuring just 15mm x 15mm with a low-profile height of 4mm. Its small form factor makes it ideal for spaceconstrained applications such as compact telematics devices, vehicle tracking and fleet management systems, wearables, and navigation devices. 

The antenna is optimized for a 50mm x 50mm ground plane, operating at 1575.42 MHz with a peak gain of 2.56dBi. Designed for SMT mounting, the ceramic patch includes an additional solder mask to enhance durability and prevent cracking due to heat expansion during high-volume, cost-sensitive assembly processes. 

Typical applications include: 

- Vehicle Tracking and Fleet Management Systems 

- Wearables 

- Navigation Devices 

The DSGP Series can be manufactured in a TS16949 first-tier automotive-approved facility and tested to AECQ200 certification if required. Further to this, full PPAP and IMDS documentation can be provided upon request. Please discuss your quality and reliability requirements with our team prior to ordering. 

Taoglas also offers custom tuning services based on minimum order quantities, contact your regional Taoglas customer support team for further information. 

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|**GNSS Frequency Bands**|**GNSS Frequency Bands**|**GNSS Frequency Bands**|**GNSS Frequency Bands**|**GNSS Frequency Bands**|**GNSS Frequency Bands**|
|---|---|---|---|---|---|
|**GPS**|**L1**<br>**1575.42 MHz**|**L2**<br>**1227.6 MHz**|**L5**<br>**1176.45 MHz**|||
||◼|||||
|**GLONASS**|**G1**<br>**1602 MHz**|**G2**<br>**1248 MHz**|**G3**<br>**1207 MHz**|||
|||||||
|**Galileo**|**E1**<br>**1575.24 MHz**|**E5a**<br>**1176.45 MHz**|**E5b**<br>**1201.5 MHz**|**E6**<br>**1278.75 MHz**||
||◼|||||
|**BeiDou**|**B1C**<br>**1575.42 MHz**|**B1I**<br>**1561 MHz**|**B2a**<br>**1176.45 MHz**|**B2b**<br>**1207.14 MHz**|**B3**<br>**1268.52 MHz**|
||◼|||||
|**L-Band**|**L-Band**<br>**1542 MHz**|||||
|||||||
|**QZSS (Regional)**|**L1**<br>**1575.42 MHz**|**L2C**<br>**1227.6 MHz**|**L5**<br>**1176.45 MHz**|**L6**<br>**1278.75e6**||
||◼|||||
|**IRNSS (Regional)**|**L5**<br>**1176.45 MHz**|||||
|||||||
|**SBAS**|**L1/E1/B1**<br>**1575.42 MHz**|**L5/B2a/E5a**<br>**1176.45 MHz**|**G1**<br>**1602 MHz**|**G2**<br>**1248 MHz**|**G3**<br>**1207 MHz**|
||◼|||||



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GNSS Bands and Constellations 

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|**GNSS Electrical**||
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||**L1/E1/B1C (1575.42MHz)**|
|**Frequency (MHz)**||
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||1565-1586|
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|**Efficiency (%)**|61.8|
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|**Average Gain (dB)**|-2.09|
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|**Peak Gain (dBi)**|2.56|
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|**Axial Ratio (dB)**|1.59|
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|**Polarization**|RHCP|
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|**Impedance**|50 Ω|
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||**Mechanical**|
|---|---|
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|**Dimensions**|25mm x 25mm x 4 mm|
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|**Weight**|10g ± 3%|
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|**Material**|Ceramic|
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||**Environmental**|
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|**Operation Temperature**|-40°C to 85°C|
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|**Storage Temperature**|-40°C to 85°C|
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|**Relative Humidity**|Non-condensing 65°C 95% RH|
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|**Moisture Sensitivity**|3<br>(168 Hours)|
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## **3.** Mechanical Drawing ey / 

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200 pcs/ Reel/ Vacuum bag 

200 pcs / Box Box: 350x340x67mm Weight: 2.6 ±3% Kg 

800 pcs / Carton Carton: 370x370x300mm Weight: 11.2 ±3% Kg 

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The following is an example on how to integrate the DSGP254B into a design. This antenna has 10 pins, where one pin is used for the RF Feed. Taoglas recommends using a minimum of 50x50mm ground plane (PCB) to ensure optimal performance. 

Top view of PCB reference design. 

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## **5.1** Schematic and Symbol Definition a” 

Above is a 3D model of the DSGP254B on a PCB reference design. 

The circuit symbol for the DSGP254B is shown below. The antenna has 10 pins as indicated below. 

**Pin Description** ~~as~~ 1 RF Feed 2-10 Ground 

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## **5.2** Antenna Footprint ag 

|**Pin**<br>~~Se~~|**Description**<br>~~Se~~|
|---|---|
|1|RF Feed|
|2-10|Ground|



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## Top Solder Paste 

## Top Solder Mask 

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## Copper Clearance for DSGP254B 

The footprint and clearance on the PCB must comply with the antenna’s specification. The PCB layout shown in the diagrams below demonstrates the DSGP254B clearance area. The copper keep out area only applies to the top layer. 

There should be a 3mm copper clearance area around RF Feed pad. 

## | [f= 

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## Antenna Integration 

The DSGP254B should be placed in the centre, as close to the edge on the long side of the PCB as possible, to take advantage of the ground plane. The RF trace must maintain a 50 Ohm transmission line. Ground vias should be placed around the RF trace. 

DSGP254B antenna mounted on a PCB reference design, showing transmission lines 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 50x50mm ground plane (PCB) to ensure optimal performance. 

Top Side (DSGP254B placement on 50x50mm PCB reference design) 

Bottom Side 

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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 

## Axial Ratio 

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## Test Setup 

Chamber Test Set-up 

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## Patterns at 1575 MHz 

## XZ Plane 

## YZ Plane 

## XY Plane 

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The DSGP254B 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 DSGP254B 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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Changelog for the datasheet 

**SPE-25-8-118 – DSGP254B** 

**Revision: A (Original First Release)** Date: 2025-04-07 Notes: Initial Release Author: Gary West 

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