Post on 31-Dec-2019
Application Note no.019 Chip Antenna Series
GPS & Glonass Chip Antenna
ACM4-5036-A1-CC-S
Prepared Checked Approved
Kidd Leeting Yuehbe
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INPAQ Technology Co., LTD
http://www.inpaq.com.tw
TEL :+886-37-585-555
FAX : +886-37-585-511
INPAQ Taiwan TEL:+886-37-585-555 FAX: +886-37-585-511
Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
Application Note no.001
INPAQ Technology Co., LTD
Application Note
GPS & Glonass Chip Antenna – ACM4-5036-A1-CC-S
Revision History: 2011-08-08 Rev.A0
Previous Version :
Page Subjects (major changes since last revision) Version
All Make up all document A0
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
ACM4-5036-A1-CC-S Application Note
Catalog
Applications ............................................................................................. 2
Features .................................................................................................. 2
Electrical Characteristic ........................................................................... 2
Antenna Dimension ................................................................................. 2
Recommended PCB Layout .................................................................... 3
Layout Description................................................................................... 4
Performance on Middle of Long Side....................................................... 5
Typical VSWR.......................................................................................... 5
Typical Free Space Efficiency and Peak Gain.......................................... 5
Typical Free Space 3D Radiation Pattern ................................................ 6
Typical Free Space 2D Radiation Pattern ................................................ 6
The Efficiency and Bandwidth for Different Position................................... 7
Peak Gain and Efficiency on Long Side ..................................................... 8
Peak Gain and Efficiency on Short Side .................................................... 8
3D Gain Pattern on Long Side ................................................................... 9
2D Gain Pattern on Long Side(1575 MHz)................................................. 10
2D Gain Pattern on Long Side(1603 MHz) ............................................... 10
3D Gain Pattern on Short Side .................................................................. 11
2D Gain Pattern on Short Side(1575 MHz) ................................................ 12
2D Gain Pattern on Short Side(1603 MHz) ................................................ 12
Mobile Phone Applications......................................................................... 13
PND Applications....................................................................................... 14
Notebook Applications ............................................................................... 16
Contact Information ................................................................................... 17
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Applications
This antenna is designed for GPS & Glonass application and it’s suitable for cellular
phones, PDA, notebook, navigator, and all devices which have GPS function.
Features
Electrical Characteristics
Electrical Specification*
ITEM GPS Glonass
Frequency Band 1570 MHz〜1580 MHz 1593 MHz〜1615MHz
VSWR < 2 <2
Polarization Linear Linear
Impedance 50Ω typ. 50Ω typ.
Central Frequency 1575 MHz 1604 MHz
*Peak Gain
(at 1575 MHz / 1603 MHz) 3.18 dBi 3.25 dBi
*Peak Efficiency
(at 1575 MHz / 1603 MHz ) 77.90% 78.85 %
* Electrical characteristic depends on INPAQ evaluation board with matching circuit.
* The dimension of evaluation board is 80 x 40mm with 15x6.3mm clearance area.
Antenna Dimension (unit:mm)
Chip Antenna L W A B L1 W1 H
ACM4-5036 5.2±0.3 3.7±0.3 0.45±0.25 0.45±0.25 1.1±0.20 0.55±0.20 0.70±0.15
‧Omni-directional radiation
‧High Efficiency
‧Low profile and compact size(5.2 x 3.7 x 0.7mm)
‧Low cost
‧Lead free soldering compatible
‧RoHS compliant
‧Tape and reel packing
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Recommended PCB layout(unit:mm)
Terminal name Terminal Dimensions
Feed 1.1 X 0.55
GND 3.7 X 0.45
GND 3.7 X 0.45
Terminal name Terminal Dimensions
Pad (Feed) 1.2 X 0.75
Pad (GND) 3.8 X 1.15
Pad (GND) 3.8 X 1.15
Ground
Feed line 50Ω
Matching Circuit
componen
Pad (GND)
Pad (Feed)
Pad (GND)
Clearance Area
(15 x 6.3 mm)
) *The slot is used for tuning frequency,
and can be eliminated in real application.
Slot
PCB pad
dimensions
Antenna pad
dimensions
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Layout Description
F. Feeding Pad
The signal from system must feed into the feeding pad.
G. Ground Pad
This pad must connect to ground plane of PCB.
C. Clearance Area
To achieve antenna performance, the clearance area is necessary and all metallization
should be removed from all PCB layers.
M. Matching Circuit
Please keep the pads for PI-matching circuit to reduce return loss and shift the band to
meet GPS application.
ACM4 5036
Matching Circuit
Customer’s Platform
GPS Chip Set
F
G
C
M
G
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Performance on Middle of Long Side
Typical VSWR
Typical Free Space Peak Gain and Efficiency
Frequency (MHz) Peak Gain (dBi) Efficiency (%)
1570 3.08 74.00
1575 3.18 77.90
1580 3.29 80.89
1593 3.30 82.35
1604 3.25 78.85
1615 3.24 75.81
Frequency
(MHz) VSWR
1570 1.29
1575 1.22
1580 1.17
1593 1.18
1604 1.35
1615 1.56
Peak Gain
Efficiency
-5.0
-3.0
-1.0
1.0
3.0
5.0
1570 1575 1580 1585 1590 1595 1600 1605 1610 1615
Frequency (MHz)
Pe
ak
Ga
in (
dB
i)
0.0
20.0
40.0
60.0
80.0
100.0
1570 1575 1580 1585 1590 1595 1600 1605 1610 1615
Frequency (MHz)
Eff
icie
ncy (%
)
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Typical Free Space Radiation Pattern
3D Radiation Pattern
Typical Free Space Radiation Pattern
2D Radiation Pattern(1575 MHz & 1604 MHz)
Location A
1575 MHz 1604 MHz
X-Y Plane
1575 MHz
X-Z Plane Y-Z Plane
Antenna
Antenna Antenna
Y
X
Z
X
Y
Z
X Y
Z
X Y
Z
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
The Efficiency and Bandwidth for Different Location
* All electrical characteristic depend on INPAQ 80 x 40mm evaluation board with matching circuit.
Locations Long side Short side
Test ltem A B C D E F
Frequency (MHz) 1575 1604 1575 1604 1575 1604 1575 1604 1575 1604 1575 1604
Bandwidth (MHz)
[VSWR<2] 101 30 43 28 29 25
Linear Peak 3.18 3.25 1.3 1.09 2.17 2.31 -1.16 -0.44 0.3 0.01 0.70 0.67 Gain
(dBi) Avg. -1.08 -1.03 -2.87 -2.97 -2.23 -1.95 -3.98 -3.14 -3.14 -3.39 -3.58 -3.64
Linear Efficiency
(%) 77.9 78.85 51.59 50.51 59.79 63.82 42.58 44.2 48.51 45.86 43.83 43.28
*Keep the antenna away from the PCB edge about 5mm.
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Peak Gain and Efficiency on Long Side
Peak Gain and Efficiency on Short Side
Location
-3.0
-1.0
1.0
3.0
5.0
1570 1575 1580 1585 1590 1595 1600 1605 1610 1615Frequency (MHz)
Pe
ak
Ga
in (
dB
i)
Location ALocation ALocation ALocation A Location BLocation BLocation BLocation B Location CLocation CLocation CLocation C0.0
20.0
40.0
60.0
80.0
100.0
1570 1575 1580 1585 1590 1595 1600 1605 1610 1615Frequency (MHz)
Eff
icie
nc
y (
%)
Location ALocation ALocation ALocation A Location BLocation BLocation BLocation B Location CLocation CLocation CLocation C
-5.0
-3.0
-1.0
1.0
3.0
5.0
1570 1575 1580 1585 1590 1595 1600 1605 1610 1615Frequency (MHz)
Pe
ak
Ga
in (
dB
i)
Location DLocation DLocation DLocation D Location E Location E Location E Location E Location FLocation FLocation FLocation F0.0
20.0
40.0
60.0
80.0
100.0
1570 1575 1580 1585 1590 1595 1600 1605 1610 1615
Frequency (MHz)
Eff
icie
nc
y (
%)
Location DLocation DLocation DLocation D Location E Location E Location E Location E Location FLocation FLocation FLocation F
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
3D Gain Pattern on Long Side
Location A
1575 MHz 1604 MHz
Location B
1575 MHz 1604 MHz
Y
X
Z
X
Y
Z
X Y
Z
X Y
Z
X
Y
Z
X
Y
Z
X Y
Z
X Y
Z
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
2D Gain Pattern on Long Side (1575 MHz)
2D Gain Pattern on Long Side (1604 MHz)
Location C
1575 MHz 1604 MHz
X-Y plane Y-Z plane
Antenna Antenna Antenna is in back
X-Y plane X-Z plane Y-Z plane
Antenna Antenna is in back
X Y
Z
X
Y
Z
X
Y
Z
X-Z plane
Antenna
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
3D Gain Pattern on Short Side
Location D
1575 MHz 1604 MHz
Location E
1575 MHz 1604 MHz
X
Y
Z
X
Y
Z
X Y
Z
X Y
Z
X Y
Z
X
Y
Z
X
Y
Z
X Y
Z
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
2D Gain Pattern on Short Side (1575 MHz)
2D Gain Pattern on Short Side (1604 MHz)
Location F
1575 MHz 1604 MHz
X-Y plane X-Z plane Y-Z plane
Antenna Antenna Antenna is in back
X-Y plane X-Z plane Y-Z plane
Antenna Antenna is in back Antenna
X Y
Z
X Y
Z
X
Y
Z
X
Y
Z
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Mobile Phone Applications
- For the mobile phone applications, because most of the key components are arranged
along the long side of the PCB, there is no space to place our antenna. So we move the
antenna to top edge of PCB as showed as follow picture. And the impedance of PCB in
top edge is smaller than in long side edge, we get narrower bandwidth and lower
performance than in long side of PCB. But we still get a workable performance by
arranging antenna and components in a reasonable position.
Symbol Suggested Distance Remark
S ≧5mm The distance between PCB edge and antenna edge
D ≧1mm The distance between antenna and receiver(or
shielding case)edge
G ≧1mm The edge of display must keep away 1mm from
antenna edge.
Receiver Camera Screw Screw
Display
Clearance area
15X6.3 mm
S
D
Ant.
INPAQ
G
ACM4 5036
D
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
PND Applications
- For the PND or Navigator applications, GPS antenna usually place at the long side of
PCB. To make the device thinner, it usually cut a part of PCB to put the battery in it and
result in a shorter PCB than mobile phone application. In order to increase the
performance of GPS antenna, we suggest to keep some part of PCB to make it look as
L-shape as figure E. However, the distance between panel and PCB will affect the
antenna performance, we suggest keep the panel away from antenna edge at least 3mm
in distance as Figure F.
Front Side
Extending PCB
PCB Battery
Figure E. Make the extending PCB to get the better performance
Ant
GPS
PCB
Ant.
Clearance area
15X6.3 mm
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Symbol Suggested Distance Remark
P ≧1mm The edge of display must keep away 1mm from
antenna edge.
G ≧3mm The distance between antenna and panel metal
Battery
Shielding
Case
Back Side
Panel (at front side)
P
PCB
Panel
Ant
G
Figure F. Keep the panel away from the PCB more than 3mm.
Ant.
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Notebook Applications
- For the notebook applications, the space is too small to place a larger PCB. As we know,
the smaller PCB we have, the worst antenna performance we get. But according to
characteristic of this antenna, because the radiation efficiency depends on the size of the
metal layer, so we can extend metal layer from PCB to panel by using copper foil. And if
the radiation plane can be extended to metal of panel, the PCB size becomes a minor
factor of antenna performance; it means we can use smaller PCB to get the similar
performance. By the way, the cable which connects from PCB to main board must fix
along the edge of display, and shorter cable will get the better performance due to its
cable loss.
Symbol Suggested Distance Remark
D ≧1mm The distance between GPS Module and the edge of
panel.
Netb
GPS Module
Camera
Module
LNA Module (with shielding case coving it)
D
Display
Copper Foil
Connecting to PCB and display
Clearance Area
Ground
ACD5036
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Application Note no.019 ACM4-5036A1 Rev.A0 08/2011
INPAQ Technology Co., LTD
Contact Information
INPAQ Technology Co, LTD
Taiwan Chunan
ADD: No.11, Ke-Yi St., Chunan, Miaoli 35059, Taiwan (R.O.C.)
TEL : +886-37-585-555
FAX : +886-37-585-511
E-Mail : info@inpaq.com.tw
Web site : http://www.inpaq.com.tw
USA Office
ADD: 21 Echo Brook Road, Rochester, NH 03839, U.S.A.
TEL:+1-603-332-6222
FAX:+1-603-509-2900
Korea Office
ADD: 221 Raemian Seocho Univill, 1445-4, Secho-Dong, Secho_gu, Seoul, Korea
130-070
TEL:+82-2-584-8959
FAX:+82-2-584-8951