Patch antenna online calculator

For more information about the design features, read the corresponding article.

Schematic representation of a PCB patch antenna and an air-substrate patch:

The calculator is based on simplified formulas for calculating microwave microstrip transmission lines and is intended only for preliminary calculations. For a more accurate analysis, use HFSS or similar programs. For this reason, this simple calculator is not suitable for calculating practical designs! In addition, it is necessary to keep in mind the very large variation of the dielectric constant of fiber glass laminate, which is available for radio amateurs.

INPUT DATA:

---

Select measurement units

Metric (SI) Imperial (USCS)

---

Enter frequency manuallyFPV 1300GPS L1LTE 1800 (band 3)LTE 2100 (band 1)Wi-Fi 2400, FPV 2400, BluetoothLTE 2600 (band 7)Wi-Fi 5500FPV 5800TE 2600 (band 7)Select frequency

Freq: Frequency MHz

50 Ω75 ΩAntenna input impedance

---

ManuallyAirGlass fiber laminate FR4Select substrate ε_r

ε_r: Dielectric constant of the substrate

h: Height of the substrate mm

I would like to store the calculator state in the browser local storage (this data isn't sent anywhere)

---

Calculate

RESULT:

---

Result output field

© 2015- 3G-Aerial
Limitations and features of antenna calculations

A patch antenna is a vivid example of a “volumetric” microwave antenna, so it is necessary to use electromagnetic simulators to calculate it, and all kinds of online calculators should always be double-checked. For verification, a simulation was made in HFSS of two random patch antennas according to the sizes obtained from the results of this calculator. One: according to the calculator's default data, the second: with an air dielectric. As can be seen from the simulation results, they are quite far from ideal, but nevertheless they cannot be considered poor. Let us repeat once again: this calculator is suitable only for preliminary calculation of a patch antenna, with further optimization in the simulator. This does not take into account the fact that the patch can have a variety of shapes, not only rectangular.

PCB patch antenna characteristics calculated in the calculator with default data

Parameter S11	VSWR

Characteristics of air-dielectric patch antenna

Parameter S11	VSWR

Related links:

• Patch Antenna - General Theory;
• Panel antenna “Ellipse-patch 2х2” for 2100 MHz band;
• Panel antenna “Double Ellipse-rectangle” for 3G/4G bands;
• Wi-Fi/3G/4G Disk-Yagi antenna, analysis, and calculation;
• Wi-Fi antenna “Tincan+”;
• DIY long range wifi antenna “Patch array 2×3”;
• DIY WiFi 2440 ±40 MHz Patch antennas for 50Ω - practical designs optimized in ANSYS HFSS;