Difference between revisions of "Multiband-antenna-for-rtk"

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=== Multi-band antenna for RTK application ===
== Multi-band antenna for RTK application ==
With the demands for high precision position, it increases the needs of received GNSS satellites’ number,making the trend of receiving multi-band GNSS system. Choosing a correct antenna is hugely important since antennas are the main interface between the GNSS space segment and the user, especially on multi-band system.
__NOTOC__
ALLYSTAR Active Antenna AGR6302/AGR6303 is designed by unique technology, covering GPS, BDS, Galileo, GLONASS, IRNSS and QZSS system, details please refer to table 1. The antenna features stable signal quality and more angle receiver on the practical conditions. It employs the stack four feeds antenna architecture with hybrid to achieve the multi-band operation/ lower axial ratio/wider half power beam width and excellent right
[[File:AGR6302G-1.png|300px|thumb|AGR6302G Patch antenna]]
hand circular polarization.
The increasing demand for highly accurate positioning has led to a growing need for receiving a greater number of GNSS satellites. This has resulted in a trend towards using multi-band GNSS systems. Selecting an appropriate antenna is crucial as it serves as the primary link between the GNSS space segment and users, particularly in multi-band systems.
With the newly architecture, the active part has two stages, one level filter and also one LNA for respective lower/higher band path. And then, the combiner of dual filter and the second level LNA output the RF gain to receiver. It provides excellent noise figure/ RF linear and LNA gain and out band rejection, resulting in good signal/noise ratio and anti-interference.
 
It is housed in a compact, industrial-grade waterproof mount enclosure, the antenna can be installed almost anywhere allowing for greater flexibility. Using SMA connector fit together with GNSS module or receiver to show the dual band RTK performance.
The AGR6302G antenna is specifically designed for RTK applications and supports GPS, BDS (BeiDou), Galileo, GLONASS, IRNSS (NavIC), and QZSS systems. For more details, please refer to Table 1. This antenna offers stable signal quality and improved reception angles under practical conditions. It utilizes a stacked four-feed antenna architecture with hybrid technology to enable multi-band operation while achieving lower axial ratio, wider half-power beam width, and excellent right-hand circular polarization.
 
In terms of its internal structure, this antenna incorporates two stages in its active component: one-level filter and one low-noise amplifier (LNA) for each lower/higher band path. The combined output of dual filters and a second-level LNA provides RF gain to the receiver. This design ensures excellent noise figure/RFL linear characteristics along with high LNA gain and out-of-band rejection capabilities. As a result, it delivers a good signal-to-noise ratio while minimizing interference.
 
The AGR6302G antenna is housed in a compact industrial-grade waterproof enclosure that allows for flexible installation options nearly anywhere. By using an SMA connector compatible with GNSS modules or receivers, it showcases its multi-band RTK performance effectively.
 
== Mechenical specs ==
 
{| class="wikitable"
|-
! style="background-color:#9b9b9b;" | Item
! style="background-color:#9b9b9b;" | Specs
|-
| Weight
| ≤200g
|-
| Dimensions
| 66.0*66.0*25.6
|-
| Cable type
| RG174
|-
| Connector type
| SMA
|-
| Cable length
| 1500mm（customizable）
|-
| Mount
| Magnet
|-
| Salt spray test
| 48H
|-
| Waterproof and dustproof
| IP65
|}
 
== Environment Feature ==
{| class="wikitable"
|-
! style="background-color:#9b9b9b;" | Item
! style="background-color:#9b9b9b;" | Specs
|-
| Temperature(Typical)
| -40℃~+70℃
|-
| Temperature(Max)
| -40℃~+85℃
|-
| Humidity
| 10 to 95% RH
|}
 
== Electrical performance ==
The electrical performance of the samples described in this document was measured under specific conditions:
*temperature: 25±15℃
*humidity: 65±20%RH
*instrument power setting: 1uW
*air pressure: (0.96±0.1) X 105 Pa
all experimental data were obtained by measuring with a block antenna connected to a grounding plate measuring 70*70mm, inside a microwave darkroom.
 
=== Antenna（Patch）Specs ===
{| class="wikitable"
|-
! style="background-color:#9b9b9b;" | Items
! style="background-color:#9b9b9b;" | Specs
|-
| Frequency Range
|GPS L1/L2/L5
BDS B1/B2/B3
 
GLONASS G1/G2
 
GALILEO E1/E5a/E5b
 
|-
| Bandwidth
| ≥100MHz
|-
| Gain
| ≥4 dBic typ (@70*70 Ground)
|-
| S.W.R
| ≤2.0
|-
| Polarization
| Right-hand circular polarization(RHCP)
|-
| Axial ratio
| ≤3 dB
|}
 
=== LNA Performance ===
{| class="wikitable"
|-
! colspan="2"  style="background-color:#9b9b9b;" | Items
! style="background-color:#9b9b9b;" | Specs
|-
| Gain
| GPS L1/L2/L5
BDS B1/B2/B3
 
GLONASS G1/G2
 
GALILEO E1/E5a/E5b
 
| 28.0±3dB
|-
| colspan="2"| Noise Figure
| 2.0 dB typ
|-
| colspan="2"| Input standing wave
| ≤2.0
|-
| colspan="2"| Output standing wave
| ≤2.0
|-
| colspan="2"| Voltage
| DC 3.0～5.0V
|-
| colspan="2"| Current
| ≤60mA (@3.3V)
|-
| colspan="2"| Impedance
| 50Ω
|}
 
== Antenna dimensions ==
[[File:AG-for-rtk-1.png|frameless|500px|Multiband rtk antenna]]

Latest revision as of 16:50, 4 November 2024

Multi-band antenna for RTK application

AGR6302G Patch antenna

The increasing demand for highly accurate positioning has led to a growing need for receiving a greater number of GNSS satellites. This has resulted in a trend towards using multi-band GNSS systems. Selecting an appropriate antenna is crucial as it serves as the primary link between the GNSS space segment and users, particularly in multi-band systems.

The AGR6302G antenna is specifically designed for RTK applications and supports GPS, BDS (BeiDou), Galileo, GLONASS, IRNSS (NavIC), and QZSS systems. For more details, please refer to Table 1. This antenna offers stable signal quality and improved reception angles under practical conditions. It utilizes a stacked four-feed antenna architecture with hybrid technology to enable multi-band operation while achieving lower axial ratio, wider half-power beam width, and excellent right-hand circular polarization.

In terms of its internal structure, this antenna incorporates two stages in its active component: one-level filter and one low-noise amplifier (LNA) for each lower/higher band path. The combined output of dual filters and a second-level LNA provides RF gain to the receiver. This design ensures excellent noise figure/RFL linear characteristics along with high LNA gain and out-of-band rejection capabilities. As a result, it delivers a good signal-to-noise ratio while minimizing interference.

The AGR6302G antenna is housed in a compact industrial-grade waterproof enclosure that allows for flexible installation options nearly anywhere. By using an SMA connector compatible with GNSS modules or receivers, it showcases its multi-band RTK performance effectively.

Mechenical specs

Item Specs
Weight ≤200g
Dimensions 66.0*66.0*25.6
Cable type RG174
Connector type SMA
Cable length 1500mm（customizable）
Mount Magnet
Salt spray test 48H
Waterproof and dustproof IP65

Environment Feature

Item Specs
Temperature(Typical) -40℃~+70℃
Temperature(Max) -40℃~+85℃
Humidity 10 to 95% RH

Electrical performance

The electrical performance of the samples described in this document was measured under specific conditions:

  • temperature: 25±15℃
  • humidity: 65±20%RH
  • instrument power setting: 1uW
  • air pressure: (0.96±0.1) X 105 Pa

all experimental data were obtained by measuring with a block antenna connected to a grounding plate measuring 70*70mm, inside a microwave darkroom.

Antenna（Patch）Specs

Items Specs
Frequency Range GPS L1/L2/L5

BDS B1/B2/B3

GLONASS G1/G2

GALILEO E1/E5a/E5b

Bandwidth ≥100MHz
Gain ≥4 dBic typ (@70*70 Ground)
S.W.R ≤2.0
Polarization Right-hand circular polarization(RHCP)
Axial ratio ≤3 dB

LNA Performance

Items Specs
Gain GPS L1/L2/L5

BDS B1/B2/B3

GLONASS G1/G2

GALILEO E1/E5a/E5b

28.0±3dB
Noise Figure 2.0 dB typ
Input standing wave ≤2.0
Output standing wave ≤2.0
Voltage DC 3.0～5.0V
Current ≤60mA (@3.3V)
Impedance 50Ω

Antenna dimensions

Multiband rtk antenna

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