NXP LID2509 Vivaldi Antenna
LID2509 Vivaldi Antenna
The LID2509 Vivaldi Antenna is a broadband antenna designed for ultra-wideband (UWB) and radar applications. It has a frequency range of 3.5 GHz to 9.0 GHz and a gain of 4 dBi to 7 dBi. The antenna is linearly polarized and has a horizontal polarization. Its radiation efficiency ranges from 73% to 88%. The antenna size is 77.25 mm x 63 mm x 1.8 mm and it can be used with NPG-170 or equivalent PCB laminate.
PCB Layout and Stackup
The antenna layout and stackup are shown in Figures 2, 3, and 4. Any dielectric material with similar RF properties may be used for the PCB.
Product Specifications
The antenna specifications are summarized in Table 1. The antenna has a VSWR of less than 1.5 and a return loss of more than 13 dB across the frequency range of 3.5 GHz to 9.0 GHz. The antenna gain varies from 4 dBi to 7 dBi depending on the frequency. The peak gain over frequency is shown in Figure 6. The gain plots of the XY, XZ, and YZ planes for frequencies of 6.5 GHz and 8 GHz are shown in Figures 7 to 11.
Product Usage Instructions
To use the LID2509 Vivaldi Antenna, follow these instructions:
- Choose a PCB laminate material with similar RF properties to NPG-170 or equivalent.
- Design the PCB layout according to the provided layout in Figures 2 and 3.
- Use the stackup shown in Figure 4 for the PCB.
- Connect the antenna to a device using an SMA Jack connector.
- Ensure that the device is compatible with the frequency range (3.5 GHz to 9.0 GHz) and polarization (horizontal) of the antenna.
- Measure the performance of the antenna to ensure that it meets the specifications provided in Table 1.
Document information
| Information | Content |
| Keywords | UWB, antenna, radar |
| Abstract | This document presents the simulation results of the LID2509 Vivaldi antenna. |
Revision history
| Rev | Date | Description |
| v.1 | 17.03.2023 | Initial version |
Introduction
The LID2509 is a linearly polarized Vivaldi antenna covering the frequency range from 3.5 GHz to 9 GHz. Therefore, it is suited to operate on most UWB channels. With a gain around 6 dBi the LID2509 is a directional antenna and was designed for UWB Radar measurements, but can also be used for UWB Ranging or any other radio technology operating in its bandwidth. The antenna features landing pads for an edge mounted SMA connector for the transition to a microstrip line. The parameters of the antenna were chosen in a way to provide a compromise between antenna size, gain and bandwidth.
The data in this user manual is derived from EM simulations only. Nevertheless, reference measurements were performed with manufactured antennas and the results match well with simulation data. Measurements showed that real antennas can have slightly reduced gain and return loss compared to simulations.
PCB Layout and Stackup
Specifications
Overview
Table 1. Antenna Parameter Overview
| Frequency | 3.5 GHz to 9.0 GHz |
| Connector Type | SMA Jack |
| VSWR | < 1.5 |
| Return Loss | > 13 dB |
| Polarization | linear, horizontal |
| Gain | 4 dBi to 7 dBi |
| Radiation Efficiency | 73% to 88% |
| Size | 77.25 mm x 63 mm x 1.8 mm |
| PCB Laminate | NPG-170 or equivalent |
Return Loss and VSWR
Gain
Peak Gain
Gain Polar Plots
3D Gain
Gain Contour Plots
The spherical coordinate system used for the contour plots in this section is as in ISO 80000-2:2019. The polar angle theta starting with 0° from the Z-axis towards the XY plane and the azimuthal angle phi starting with 0° from the X-axis towards the Y-axis.
Front to Back Ratio
Radiation Efficiency
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Tables
Tab. 1. Antenna Parameter Overview ……………………… 7
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