Professional
Patterns in 3D. Every antenna in the link lab is drawn where it stands and the way it points.
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Your download
Download Antenna Calculator
Thank you for subscribing. Download the Setup of your plan and run it to install the app on your PC. When the app opens, create your account with the email address you subscribed with.
Windows 10 and 11, 64-bit. The first installation takes about 5 minutes and needs an internet connection. If Windows shows “Windows protected your PC”, choose More info, then Run anyway.
Antenna Calculator for Windows
See the beam.
Before you build it.
47 antenna, microwave and RF calculators in one Windows app. Every result shows its equations and the pattern behind it, and in Professional the link lab tests real links between two or more antennas.
Free for 14 days, no card needed. Then from €35.99 a month, €19.99 for students.
Get the highlights.
47
calculators for antennas, microwave and RF, with one search box.
117
reference checks you can run on your own PC.
Professional
The link lab. Put antennas on a map and see whether every link closes.
Steer a beam. Live, right here. A uniform linear array with half-wavelength spacing.
steer +0.0°
HPBW 12.8°
side lobe −13.3 dB
directivity 14.1 dBi
Drag across the plot to steer the beam.
From Standard
A live Smith chart. Lines, matching and noise, following Pozar.
What moves what. Change one input by 10% and see which results follow.
Radiation patterns
See the antenna behind every number.
Type a value and the pattern redraws as you type. The 3D view runs on your graphics card: drag to rotate, scroll to zoom, double-click to reset.
Every cut, measured.
2D cuts in the E- and H-plane mark the half-power beamwidth, front-to-back ratio and side-lobe level, in dB with a 20 to 60 dB range or linear.
Impact and sweep.
The Impact view shows how far each result moves when one input changes by 10%. A sweep plots any result against any input, with everything else held.
Any unit, any expression.
Type 5.8 GHz, 3e8/2.4e9 or c/915e6. Every result is saved with its inputs and exports to CSV.
Link lab Professional
Test a link before you build it.
Put two or more antennas on the map and give each its type, power, height, pointing and polarization. The lab works out the budget of every link and shows whether it closes.
UAV datalink · 2.4 GHz
Video link · 5.8 GHz circular
Mesh · 3 nodes · 5 GHz
mmWave backhaul · 60 GHz
Phased array to 2 users · 28 GHz
MIMO 4×4 Wi-Fi · 5 GHz
VHF two-ray · 150 MHz
- Antennas
- Dipole, monopole (whip or blade), Yagi-Uda, patch, horn, open-ended waveguide, parabolic dish, phased array, helix, custom from datasheet numbers, isotropic
- Polarization
- Vertical, horizontal, slant ±45°, RHCP, LHCP, with a cross-polar limit
- Technology
- Point-to-point (SISO), MIMO, mesh network, point-to-multipoint
- Propagation
- Free space or two-ray ground reflection, plus absorption and extra loss
- Solves for
- Received power, transmit power needed, maximum range
- Views
- Map, 3D scene, budget, range, capacity, coverage
Microwave & RF systems
From the line to the receiver.
17 calculators follow D. M. Pozar's Microwave Engineering. The Smith chart, stability circles and line-up plots redraw with every input, and each calculator names the section its equations come from.
- Lines
- Terminated line, microstrip, stripline, coax, rectangular waveguide
- Matching
- L-section, single shunt stub, quarter-wave and binomial transformers
- Noise & IP3
- NF ↔ noise temperature, four-stage line-up (NF, gain, IP3, SFDR), two-tone IM3, amplifier stability and maximum gain
- Systems Professional
- Receiver sensitivity, G/T, link budget with SNR margin, radar range equation, C/N₀
Checked results
117 reference checks. Run them yourself.
Every calculator is tested against worked examples from the course material it is built on, from Balanis' Antenna Theory, Proakis & Salehi's Digital Communications and Pozar. Click Verify results in the app to run them on your PC. Setup runs the same checks before it replaces your installed version.
Antenna Calculator reference checks check expected got PASS Q11 Aₑ for D = 900 at 1 GHz 6.437 m² 6.4369 m² PASS λ/2 dipole radiation resistance 73.13 Ω 73.13 Ω PASS Balanis Ex 2.10 realized gain 1.6376 1.6377 PASS Balanis Ex 14.1 patch length L 0.906 cm 0.90534 cm PASS Pozar 5.4 quarter-wave 10→50 Ω: Z₁ 22.36 Ω 22.361 Ω PASS Proakis Ex 4.10-3: P_R/N₀ 84.3 dB-Hz 84.213 dB-Hz PASS Proakis: 16-QAM needs ≈ 13.4 dB for 10⁻⁵ 13.4 dB 13.435 dB … 117/117 checks passed.
Every calculator
47 calculators. One search box.
Search the way you think: a quantity, a unit or a term such as VSWR, dBm, far field or G/T. The app's own search works the same way.
47 / 47
Names and descriptions as they appear in the app.
Install & update
Installs like any Windows program.
Get the Setup file
After checkout, an email links you to the download page with the Setup of your plan.
Run the setup wizard
Accept the license, choose the folder and shortcuts, and watch the progress. Setup builds the app on your PC in about 5 minutes and needs no administrator rights.
Create your account
When the app opens, sign up with the email address you subscribed with. A 6-digit code by email confirms it, and the app unlocks your plan.
- System
- Windows 10 or 11, 64-bit
- Disk
- About 260 MB, plus about 680 MB if you keep the build tools for faster updates
- Internet
- For the first installation (about 150 MB download) and to sign in. The app works offline for up to 14 days at a time.
- Python
- Not needed in advance. Setup installs Python 3.12 for your user account if none is found.
- Graphics
- OpenGL for the 3D views; without it the app falls back to software drawing
- Language
- The app's interface is in English.
Pricing
Pick a plan. Cancel any time.
Every plan includes 2D and 3D radiation patterns, the impact view and the Windows Setup. Pay monthly or yearly.
Free trial
14 days free. No card needed.
Download the app and create an account: the Student plan's 30 calculators open at once, free for 14 days. The Standard and Professional calculators are there too, with a lock, so you can see what each plan adds.
One free trial per person and per computer. When it ends, the calculators lock until you choose a plan. Nothing is charged automatically.
Student
For students at listed universities and colleges
€19.99/ month
or €199 a year, save 17%
- 30 calculators for antennas, transmission lines and waveguides
- 2D and 3D patterns, impact view and sweep
- Confirmed with a code sent to your university email
- Cancel any time
Standard
For engineers who design lines, matching and RF chains
€35.99/ month
or €379.99 a year, save 12%
- 41 calculators, adding matching networks, patch antennas, noise, IP3 and amplifier stability
- Complete Smith charts and stability circles
- 2D and 3D patterns, impact view and sweep
- Cancel any time
Professional
Everything, including the link lab and what comes next
€55.99/ month
or €599 a year, save 11%
- All 47 calculators, adding receivers, G/T, radar, C/N₀ and modulation bit error rates
- The link lab: test links between antennas on a map
- First access to new modules, starting with phased-array design
- Lab-instrument test automation is planned
- Cancel any time
Compare plans.
| Calculators | Student | Standard | Professional |
|---|---|---|---|
| Calculators | |||
| Basics | Included | Included | Included |
| Radiation & fields | Included | Included | Included |
| Pattern & beam | 4 of 5 | Included | Included |
| Directivity & gain | Included | Included | Included |
| Aperture & reception | Included | Included | Included |
| Impedance & bandwidth | 3 of 4 | Included | Included |
| Transmit & link | Included | Included | Included |
| Antenna models | 1 of 3 | Included | Included |
| Lines & waveguides | Included | Included | Included |
| Impedance matching | Not included | Included | Included |
| Noise, gain & linearity | Not included | Included | Included |
| Receivers & systems | Not included | Not included | Included |
| Calculators in total | 30 | 41 | 47 |
| Views and tools | |||
| Complete Smith charts and stability circles | Results only | Included | Included |
| 2D and 3D patterns, impact view, sweep, history and CSV export | Included | Included | Included |
| Link lab | Not included | Not included | Included |
| What's next | |||
| New modules, starting with phased-array design | Not included | Not included | First access |
| Lab-instrument test automation | Not included | Not included | Planned |
Student pricing
Check your eligibility.
Student pricing is for students at the universities and colleges in our list of more than 24,000 institutions worldwide, with engineering and technology schools well covered. Choose yours and enter your university email address.
To confirm the address is yours, we email it a 6-digit code. The checkout then opens for that address only, and your receipt and download link go to it.
If your university is not in the list, student pricing is unfortunately not available. University lists: university-domains-list, JetBrains swot.
Subscribe at checkout
Choose a plan and pay on the secure Lemon Squeezy checkout. Students first confirm their university email with a code.
Receipt by email
Your confirmation and receipt arrive straight away.
Download link by email
When the payment has cleared, a second email links you to the download page of this site. Install the app and create your account with the same email address.
Cancel any time
Every plan can be cancelled whenever you like, from the link in your receipt.
Prices in euros. Payments, receipts and cancellations are handled by Lemon Squeezy.
Questions? Answers.
Is there a free trial?
Yes: 14 days, no card needed. Download the app, create an account and confirm your email; the Student plan's 30 calculators open straight away. The Standard and Professional calculators stay visible with a lock. The app shows how many days are left, and when the trial ends the calculators lock until you choose a plan. There is one free trial per person and per computer.
How do I get the app after I subscribe?
You get a confirmation with your receipt by email straight away. When the payment has cleared, a second email links you to the download page, where you download the Setup of your plan. When the app opens, create your account with the email address you subscribed with.
Can I cancel?
Yes. Every plan, monthly or yearly, can be cancelled at any time from the link in your receipt email.
Who can get the student price?
Students at the universities and colleges in our list of more than 24,000 institutions worldwide, using their university email address. We email a 6-digit code to that address to confirm it is yours. If your university is not in the list, student pricing is unfortunately not available.
Who handles the payment?
Lemon Squeezy runs the checkout. It takes the payment, sends your receipt and gives you the link to cancel or update your card at any time.
What does Professional add?
Everything in Standard, plus the five receiver and system calculators (receiver sensitivity, G/T, link budget with SNR margin, radar range and C/N₀) and the link lab. Professional subscribers also get new modules first, starting with phased-array design, and lab-instrument test automation is planned.
Which computers does it run on?
Windows 10 and Windows 11, 64-bit. The 3D views use the graphics card through OpenGL; on a PC without it, the app says so in its status bar and draws the 3D views in software.
Do I need Python or other software first?
No. Setup looks for Python 3.10 to 3.14 and, if there is none, installs Python 3.12 for your user account with Windows Package Manager. The components the app needs go into a private folder, so your own Python setup is not touched.
Why does Setup need an internet connection?
Setup builds the app on your PC from its source code, so the first installation downloads about 150 MB of components. After that the app needs the internet only to sign in and check your plan, and works offline for up to 14 days at a time.
How do updates work?
Run the new Setup file. It finds the installed copy and updates it in place, so there is no need to uninstall first. If the app is open, Setup asks before closing it. If you kept the build tools, an update takes about 2 minutes.
Windows shows “Windows protected your PC”. Is that expected?
SmartScreen shows this for programs it has not seen often yet. Choose More info, then Run anyway.
Where do the formulas come from?
The antenna calculators follow S. Joardar's Basics of Antennas course material and C. A. Balanis, Antenna Theory, 4th edition; the microwave and RF-system calculators follow D. M. Pozar, Microwave Engineering, 4th edition, and the digital-link calculators J. G. Proakis and M. Salehi, Digital Communications, 5th edition. Each calculator shows its equations and names its source, and 117 reference checks compare the results with worked examples.
How do I remove it?
Settings › Apps › Installed apps › Antenna Calculator › Uninstall. The uninstall wizard can also remove the build tools Setup keeps for faster updates.
What if the student plan isn't enough?
The student plan covers 30 calculators. For more, subscribe to Standard or Professional at the regular price and cancel the student plan from the link in its receipt.
How can I tell you what I think?
Use the feedback form at the bottom of this page, or Send feedback in the app's account menu. Write as much as you like; only the developer reads it.
Is the app available in other languages?
The app's interface is in English, and so are the student verification page and the emails. This website is available in English, German, French, Spanish, Dutch, Italian and Polish.
How can I tell you what I think?
Use the feedback form at the bottom of this page, or Send feedback in the app's account menu. Write as much as you like; only the developer reads it.
Feedback
Tell us what you think.
Ideas, problems, a calculator you're missing, what you use it for — write as much as you like. Only the developer reads it.