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ASGPDF254.A
RF Antenna, 1.561 to 1.603GHz, GPS/GNSS/Glonass/Galileo/BeiDou/QZSS/SBAS/L-Band, 3.55dBi, 50 ohm
⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
- Manufacturer: TAOGLAS
- Product type:
- Gain: 3.55dBi
- SVHC: To Be Advised
- VSWR: 1.4
- Input Power: -
- Antenna Type: GPS / GNSS / Glonass / Galileo / BeiDou / QZSS / SBAS / L-Band
- Frequency Max: 1.603GHz
- Frequency Min: 1.561GHz
- Product Range: -
- Input Impedance: 50ohm
- Antenna Mounting: SMD
- Antenna Polarisation: Linear
| Delivery and price | |
|---|---|
| Units per pack | 100 |
| Price | 13.19 € |
| Current stock | 200+ |
| Lead time | 30 days |
Datasheet
## ye > TAOGLAS.
+ 5 Qd iG a a) +) © C)
Active GNSS Surface Mount Patch
**Part No: ASGPDF254.A**
**Description**
GPS/GLONASS/BeiDou/Galileo SMD Dual Feed Active Patch with Embedded Active Circuitry
**Features:**
Embedded Dual-Feed Patch for Lowest Axial Ratio Covers Bands:
- GPS L1C
- GLONASS L1
- Galileo E1
- BeiDou B1
SMD Antenna – No Cable and Connector Required Dimension: 25*25*6.5mm
Designed for a 70x70mm Ground plane RoHS & Reach Compliant
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1. Introduction 2<br>2. Specification 3<br>3. Antenna Characteristics 5<br>4. Radiation Patterns 11<br>5. LNA Characteristics 15<br>6. Mechanical Drawing 17<br>7. Antenna Integration Guide 18<br>8. Packaging 24<br>9. Solder Reflow Profile 26<br>Changelog 27<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 Taoglas ASGPDF254.A is a single band active GNSS patch covering GPS/GLONASS/BeiDou/Galileo. The ASGPDF254.A has been designed with a dual pin patch to enhance performance by improving multipath rejection so signals can be received and sent more clearly.
With hidden active circuitry embedded between the ceramic patch and PCB base, it has been designed to allow the user to mount it directly onto their device PCB. This eliminates the need for using a cable and connector thus speeding up the assembly process by allowing successfully solder surface mount components to a circuit board via the SMD process. The ASGPDF254.A measures 25 x 25 x 6.45mm and is optimized for a ground plane size of 70*70mm being required for operation however smaller ground planes can be used.
The ASGPDF254.A also includes a two-stage LNA and a front-end SAW filter to reduce out of band noise such as from nearby cellular transceivers and this improves the probability of the wireless device passing radiated spurious emissions certification. As with many high performance Taoglas patches, the series is produced in a TS16949 automotive quality approved facility, and each patch produced is 100% tested for gain (S21) and return loss (S11) to ensure total consistency of performance.
Typical Applications Include:
- Wearables
- Asset Tracking
- Navigation Systems
Taoglas also offers custom tuning service 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**|
||◼||◼|||
## GNSS Bands and Constellations
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|||||
|---|---|---|---|
||**GNSS Electrical**|||
|||||
|||||
|**Frequency (MHz)**|**1561**|**1575.42**|**1603**|
|||||
|||||
|**Efficiency (%)**|30.3|61.8|50.7|
|||||
|||||
|**Average Gain (dB)**|-5.19|-2.09|-2.95|
|||||
|||||
|**Peak Gain (dBi)**|1.23|4.36|3.55|
|||||
|||||
|**Impedance**|50 Ω|||
|||||
|||||
|**Polarization**|Linear|||
|||||
|||||
|**Radiation Pattern**|Directional|||
|||||
|**LNA and Filter Electrical Properties**|**LNA and Filter Electrical Properties**|**LNA and Filter Electrical Properties**|**LNA and Filter Electrical Properties**|
|---|---|---|---|
|||||
|**Frequency (MHz)**|**1561**|**1575.42**|**1602**|
|||||
|||||
|**Return Loss (dB)**|<-10|<-10|<-10|
|||||
|||||
|**Gain @ 3V (dB)**|14.3|14.9|13.7|
|||||
|||||
|**Noise @ 3V (dB)**|2.0|1.9|2.0|
|||||
|||||
|**DC Power Input (V)**|1.8 ~ 5.5|||
|||||
|||||
|**Power consumption @3V (mA)**|4.5|||
|||||
||> 60 @ 617-960 MHz|||
|**Outer Band Attenuation (dB)**||||
||> 50@1,710-2,170 MHz|||
|||||
||**Mechanical**|
|---|---|
|**Ceramic Dimension (mm)**|25 x 25 x 6.4|
|**Weight (g)**|--|
|**Material**|Ceramic|
|||
||**Environmental**|
|**Operation Temperature**|-40°C to 85°C|
|**Humidity**|Non-condensing 65°C 95% RH|
|**Moisture Sensitivity Level (MSL)**|3 (168 Hours)|
* Antenna properties were measured with the antenna mounted on 70*70mm Ground Plane.
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## S11 / VSWR / Return Loss Test Setup
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## **3.2** Return Loss |
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0<br>-10<br>opeeee ee |<br>LLLSS > ie<br>-20 oo<br>PE)|<br>-30<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>Frequency [MHz]<br>VSWR<br>4<br>6.0<br>SERRE) Le<br>5.0 SERRE eee |) h)) [LL]<br>SRR)<br>Sees<br>4.0 |) | eee<br>SRR)<br>Sees<br>3.0 |) | eee<br>SRR)<br>Sees<br>2.0 |) | eee<br>SSSSSSG00000)<br>Li EP oe eee| SOSceen<br>1.0<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>Frequency [MHz]<br>**----- End of picture text -----**<br>
## **3.3** VSWR | 4
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## **3.4** Efficiency _
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100%<br>90%<br>PTET ET TT TT TTTT<br>80%<br>TELE TTT TTT TT<br>70%<br>TEE TTT TT TT TA<br>Tee TT TT TT<br>60%<br>SERRE ERR ee) en eee<br>50%<br>40%<br>TET ET TT TT TT Te<br>30%<br>TEE TTT TT TT TN TT<br>20%<br>Tei t TTT TT TT VIS PT<br>10%<br>Tet TT TT ey IS NAS TT<br>tit<br>0%<br>ti | | US| | AE<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>Frequency [MHz]<br>**----- End of picture text -----**<br>
## **3.5** Average Gain _
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0.0<br>SERRE RRREeeE 1)<br>-2.0<br>BERRRRERee| 1) eee<br>ERRRRREREREe6) 6<br>BREEEEEREEEEE|<br>-4.0<br>| RE<br>ERRRRREREEEe6)<br>Soeeeeeeeeees|)<br>-6.0<br>ttt PETR) Nee<br>BRREEEEREEEPE<br>-8.0<br>PLETE ELL LTT RE| AUAE E E R<br>Seeeeeeeeeeee<br>-10.0<br>| lee<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>Frequency [MHz]<br>**----- End of picture text -----**<br>
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## **3.6** Peak Gain _
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10.0<br>| | | | | | | | | | | | | ES ES PP<br>ee ee<br>8.0<br>| | | | | | | | | | | | | ES ES PP<br>ee ee<br>6.0<br>| | | | | | | | | | | | | SNS | | TT<br>2<br>4.0<br>| | | | | | ft | Tl ht ht | UAT Ee<br>2.0 2 eee<br>0.0 po | | | PE A EN<br>| | | | | | | | | tT | | UYU EN<br>-2.0 ee ee ee ee ee ee<br>| | | | | | ft | cE hr | UY | e e NN<br>a e<br>-4.0<br>| [| | | { [| | | | | Yl | YRS yy fT TNT ft<br>-6.0 ee ee ee eeeeee<br>| | | | | | ft | cP am ld UT heeeee<br>-8.0 ee ee ee ee ee eee eee ee Se<br>| | | | | | tl PAP TT | | eeeI<br>ee<br>-10.0 eee eee) ne nee eee<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>Frequency [MHz]<br>Axial Ratio vs Frequency<br>9.0<br>BRRRRERRRREe)61 Re<br>Piteeeeeeeeee|| | eee<br>Poeeeeeeeeeee))<br>6.0<br>6) ee<br>SRRRRRRRRe)61 Re<br>SRRRRERREeees)61 Ee<br>3.0<br>SERREREREEEEE| |) EERE<br>eee<br>SRRRRRGeeeees)<br>0.0<br>PTET ELT TTT TT TR| eeeTP<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>Frequency [MHz]<br>**----- End of picture text -----**<br>
## **3.7** Axial Ratio vs Frequency nay
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## **3.8** Axial Ratio @1561MHz |
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9.0 9.0<br>SR Reeee ie ThE<br>of eeeeeel ee SaReeeeeeiee<br>6.0 Sa eeeee ee 6.0 PA}<br>Py aah eeeeeee<br>Tie qo<br>3.0 3.0<br>WW AL tit<br>MTV Jib yp<br>0.0 oeeeeeeLey nee ye 0.0 LMM bid ALE<br>|<br>-180 -120 -60 0 60 120 180 -180 -120 -60 0 60 120 180<br>Angle [Deg] Angle [Deg]<br>**----- End of picture text -----**<br>
## **3.9** Axial Ratio @1575MHz |
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9.0 9.0<br>SR eeeee Thee<br>Ay Se Geeeeeeie<br>0 eeeeee TNLE<br>6.0 6.0<br>EA A<br>Sc. eeeeee ee 1c.eeeeeeeet<br>fit ty<br>3.0 3.0<br>WL AAL JNM LEA<br>ie ee ABEL Veece nee<br>0.0 0.0<br>Leite ye bit<br>-180 -120 -60 0 60 120 180 -180 -120 -60 0 60 120 180<br>Angle [Deg] Angle [Deg]<br>**----- End of picture text -----**<br>
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**3.10** Axial Ratio @1602MHz 7
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9.0 9.0<br>THOU = ooo<br>STESTE PIRP<br>6.0 6.0<br>TIGA Pee Tp<br>TONER, Ay<br>3.0 3.0<br>| \ ! \/ \ LANLA<br>WN RAR 0 POEMS<br>0.0 WOE EMER 0 0.0 Per eRPree<br>-180 -120 -60 0 60 120 180 -180 -120 -60 0 60 120 180<br>Angle [Deg] Angle [Deg]<br>**----- End of picture text -----**<br>
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## Test Setup
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Y<br>X Z<br>**----- End of picture text -----**<br>
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## Radiation Patterns @1561MHz
## XY Plane
## XZ Plane
## YZ Plane
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## Radiation Patterns @1575MHz
## XY Plane
## XZ Plane
## YZ Plane
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## Radiation Patterns @1602MHz
## XY Plane
## XZ Plane
## YZ Plane
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## LNA Block Diagram
## Gain
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20<br>10<br>0<br>-10<br>-20<br>-30<br>-40<br>-50<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>(MHz)<br>(dB)<br>**----- End of picture text -----**<br>
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## **5.3** Noise Figure Ey
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5<br>4 P| | | | | ft fff<br>3<br>2<br>SEES<br>PF | | Yor | | tl<br>1 Pot | | | | ft tf tf ft<br>1560 1570 1580 1590 1600 1610<br>(dB)<br>**----- End of picture text -----**<br>
## **5.4** Out-Of-Band Rejection Ea
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20<br>10<br>0 EERE<br>YT | | | Hi | |EEE| | | |EEEEEE| ct | rt c E ET E EE<br>-10<br>SEE EEE EEE<br>-20<br>-30<br>FEEAEEE HEE EES CECE<br>-40<br>pe WA<br>-50 ee le<br>Niettdad ee to |ohliad<br>ii P| TT<br>-60<br>500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000<br>(MHz)<br>(dB)<br>**----- End of picture text -----**<br>
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## **7.1** Schematic Symbol and Pin Definition aaa
The circuit symbol for the antenna is shown below. The antenna has 9 pins as indicated below. Pin 1 represents the GNSS frequency bands at 1559 - 1610MHz.
|Pin<br>~~ee~~|Description<br>~~ee~~|
|---|---|
|1|RF Feed|
|2-9|Ground|
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## Antenna Integration
The antenna should be placed at the center of the ground plane with a length and width of 70mm. Maintaining a square symmetric ground plane shape and symmetric environment around the antenna is critical to maintaining the excellent axial ratio and phase center performance shown in this datasheet.
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TAOGLAS<br>TAOGLAS<br>ASGPDF254.A<br>ASGPDF254.A Active Antenna<br>For GNSS_L1 Band Application<br>**----- End of picture text -----**<br>
Top Side w/ Solder Mask
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TAOGLAS<br>TAOGLAS<br>ASGPDF254.A<br>_—$—————————<br>**----- End of picture text -----**<br>
Top Side w/o Solder Mask
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## PCB Layout
The footprint and clearance on the PCB must comply with the antenna specification. The PCB layout shown in the diagram below demonstrates the antenna footprint.
Topside
Bottom Side
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## Evaluation Board
Topside
Bottom Side
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## **7.5** Footprint aaa
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The ASGPDF254.A can be assembled by following the recommended soldering temperatures are as follows:
The is not limited to the number of passes through the reflow process. Smaller components are typically mounted on the first pass, however, we do advise mounting the when placing larger components on the board during subsequent reflows.
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The ASGGB254.A performance varies at different ground plane sizes, the results are shown in this section
## **10.1** VSWR ina
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**----- Start of picture text -----**<br>
5.0<br>4.0<br>3.0<br>2.0<br>He<br>1.0<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>Frequency [GHz]<br>70X70(mm) 50X50(mm) 35X35(mm) 25X25(mm)<br>10.2 Efficiency<br>ina<br>100%<br>80%<br>60% \<br>k \<br>40%<br>\\ A<br>20%<br>0%<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>Frequency [GHz]<br>**----- End of picture text -----**<br>
## **10.2** Efficiency ina
70X70(mm) 50X50(mm) 35X35(mm) 25X25(mm)
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## **10.3** Peak Gain |
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10.0<br>|<br>8.0 | | | | | | | | | | | | | (Ee Ee Pt ft<br>| | | | | | | | | | | | | Pee Er tt tT | |<br>6.0 | | [| | | [| {| | | | | | | FESS ey fT ft yt tt<br>| | | | | | | | ft ft ft | | weep pe tt<br>4.0 | | | | | | | | | | | | | GEREN Pt tT |<br>| | || || | | f| |tf| |tt| || || W A RNERNe NeT Tt ft Py<br>2.0<br>| | | | | fj | | f | | | | AYN IN XT Tt<br>0.0 | | | | | | | | | | | | TAPP INN ENOIN GG ft tT<br>| | | | | | | | | | | | YAP IXNETNIN Tt ct hy<br>-2.0 | | | | | | | | | | | | AAI XN EN AIT ty<br>| | [ | | | [| | | | | Y AAT IN NION TNT tt td<br>-4.0 | | | | | | ft | ft | TA AAA PONY OTN ONY TT<br>| | | | | | | | | | YY AR I NNT AEN Ty<br>-6.0 | | | | | | | | | aA A) XN oT NUING<br>| | | | | | | | TA TAY | yp PIX \ TING ST<br>-8.0 | | f | | | | | Wl vey | NAL | RI AN I<br>-10.0 | | | | | | LA tA i | de Pr ININ TOA<br>1400 1425 1450 1475 1500 1525 1550 1575 1600 1625 1650 1675 1700<br>Frequency [GHz]<br>70X70(mm) 50X50(mm) 35X35(mm) 25X25(mm)<br>**----- End of picture text -----**<br>
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10.4 Efficiency<br>|<br>0.0<br>LEE<br>-2.0<br>pitt EE | ee<br>SERRERRRReees)\\\\ Reeeeee<br>SRRReeeeeeeee<br>-4.0<br>|) aoe<br>LEESEEReeeeeeeeI<br>-6.0<br>BERR |) \\\ See<br>pp RRER Ree)hee<br>-8.0<br>LEEEN| ||<br>SeeeeeeeeeIRIN<br>-10.0<br>ie) 2 ee<br>1.40 1.43 1.45 1.48 1.50 1.53 1.55 1.58 1.60 1.63 1.65 1.68 1.70<br>Frequency [GHz]<br>70X70(mm) 50X50(mm) 35X35(mm) 25X25(mm)<br>**----- End of picture text -----**<br>
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Changelog for the datasheet
**SPE-23-8-190- ASGPDF254.A**
## **Revision: A (Original First Release)**
Date: 2023-06-22 Notes: Initial Release Author: Gary West
## **Previous Revisions**
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Updated at June 9, 2026
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