M4HCT-A-SMA

M4HCT-A-SMA L1: GPS, GLONASS, GALILEO, BEIDOU Part #: 100-00117-01 **Description** The M4HCT-A-SMA is an active multi-frequency, high-accuracy, GNSS antenna for the L1 GPS, Galileo, Beidou and GLONASS bands. The antenna is built on proprietary Maxtena Helicore® technology providing exceptional pattern control, polarization purity and high-efficiency in a compact form factor. It features an integrated SMA connector and rugged IP67 automotive grade components. The M4HCT-A-SMA is ideal for applications requiring minimal integration effort or for retrofitting existing products. The antenna is equipped with an O-ring. **Passive Antenna Performance** x Parameter Specification Frequency 1559-1607 MHz (L1, E1, B1, B1-2, G1) Peak Efficiency 49% Polarization RHCP Realized Gain 0.5 dB Axial Ratio Max 0.9 dB at the Zenith VSWR Max 2:1 Beamwidth 125˚ **Phase Center Variation** Maximum Phase Center Variation (mm) ~~———~~ 7 In azimuth plane Max 10 mm As low as 40 degree elevation Max 10 mm Antenna images not to scale Between samples Max 5 mm **Features** Over frequency band Max 10 mm ~~Se~~ • Quadrifilar helix antenna **RF Specifications** GLONASS, Galileo, Beidou Parameter Specification • Rugged IP67 rating with SMA mount Conducted Gain 30 dB ±3 dB • Small form factor Noise Figure 1.5 dB typical, 2 dB max • Ground plane independent Voltage 3.0 to 5.0 V ~~——~~ Current 25 mA max applications Out of Band Rejection 40 dBc • Low power consumption Group Delay Variation Less than 5ns over GNSS bands elevation and among different samples EMI Immunity Out of Band 30 V/m • Ultra-lightweight ESD Circuit Protection 15 kv human body model air discharge 

- **Features** • Quadrifilar helix antenna • Concurrent GNSS reception on L1: GPS, GLONASS, Galileo, Beidou 

- Rugged IP67 rating with SMA mount 

- GIS, RTK and other high accuracy GNSS applications 

- Low phase center variation over azimuth and elevation and among different samples 

- Automotive grade electronics 

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Maxtena Inc. 7361 Calhoun Place, Suite 102 Rockville, MD 20855 1-877-629-8362 info@maxtena.com 

**www.maxtena.com** 

## **L1 band radiation patterns** 

Maxtena’s M4HCT-A-SMA uses patented Helicore[®] technology which results in minimal dependence on frequency and features a wide beamwidth, low axial ratio and radiation pattern symmetry across all desired frequencies in the L1 band. 

**RHCP Realized Gain [dBic] - Elevation Cuts** 

**RHCP Realized Gain [dBic] - Azimuth Cuts** 

A 125 degree beamwidth ensures excellent hemispherical coverage. 

Symmetric coverage even in low elevation enhances accuracy. 

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Axial Ratio [dB] - Zenith<br>**----- End of picture text -----**<br>


**Axial Ratio [dB] - Azimuth Cuts** 

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Maxtena Inc. 7361 Calhoun Place, Suite 102 Rockville, MD 20855 1-877-629-8362 info@maxtena.com **www.maxtena.com** 

## **Phase Center Variation** 

Maxtena’s M4HCT-A-SMA has minimal phase center variation over azimuth and elevation in the L1 band. 

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Phase Center Variation vs. Elevation in L1 band.<br>**----- End of picture text -----**<br>


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Phase Center Variation vs. Azimuth at Theta=30˚ in L1 band.<br>**----- End of picture text -----**<br>


## **Excellent Group Delay Variation** 

Using GPS signal carrier phase to increase accuracy in GNSS applications has been proven reliable and has made mm-level accuracy possible. However, in resolving carrier phase ambiguity, it is necessary to make sure carrier phase is received and measured accurately and that the effect of antenna and receiver on carrier phase is minimized. Maxtena’s M4HCT-A-SMA has a flat response over the GNSS band that it covers and has minimal group delay variation over frequency. 

## **Filtering and LNA Performance** 

Maxtena’s M4HCT-A-SMA antenna has a flat response over the L1 GNSS bands, with less than 1 dB variation over the band. The superior out-of-band rejection ensures minimal interference. 

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< 2 ns group delay variation over L1-band.<br>**----- End of picture text -----**<br>


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Flat conducted gain response.<br>**----- End of picture text -----**<br>


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WIRELESS INNOVATIONS COMPANY<br>**----- End of picture text -----**<br>


Maxtena Inc. 7361 Calhoun Place, Suite 102 Rockville, MD 20855 1-877-629-8362 info@maxtena.com 

**www.maxtena.com** 

**Mechanical Specifications** 

a Parameter Specification | Operating Temperature Range -40 to +105˚C | Environmental Standards IP67 rating ~~| |~~ Cabling and Connector No cable, male SMA connector Weight 25 grams ~~SS~~ 

Diimensions are in mm. 

MAXTENA 

WIRELESS INNOVATIONS COMPANY 

Maxtena Inc. 7361 Calhoun Place, Suite 102 Rockville, MD 20855 1-877-629-8362 info@maxtena.com 

**www.maxtena.com**