Duplicate from becklabash/rectangular-patch-antenna-freq-response

Co-authored-by: Beck LaBash <becklabash@users.noreply.huggingface.co>

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README.md

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+---
+language: en
+license: mit
+pretty_name: Rectangular Patch Antenna Frequency Response Dataset
+size_categories:
+    - 1K<n<10K
+tags:
+    - patch-antenna
+    - antenna-design
+    - microwave
+    - rf
+    - electromagnetic-simulation
+    - inverse-design
+splits:
+  - name: train
+    num_examples: 2051
+---
+
+# Rectangular Patch Antenna Frequency Response Dataset
+
+Simulated S₁₁ frequency response curves for coaxial-fed rectangular patch antennas with varying dimensions and feed positions.
+
+This dataset was released as part of [LaBash et al., "Improving Generative Inverse Design of Rectangular Patch Antennas with Test Time Optimization"](https://arxiv.org/abs/2505.18188).
+
+
+## Dataset Description
+
+Coaxial-fed rectangular patch antennas consist of a feed pin that passes through the ground plane to a metallic patch on a dielectric substrate. The design configuration of a single coaxial-fed rectangular patch antenna is parametrized by (*L*, *W*, *p*), where:
+- *L* is the length of the patch in mm
+- *W* is the width of the patch in mm
+- *p* is the position of the feed point relative to the center of the patch along the length axis
+
+<p align="center">
+  <img src="assets/patch_antenna_diagram.png" alt="Rectangular Patch Antenna Configuration - Top and Side Views" width="50%">
+</p>
+
+<p align="center">
+  <em>Figure 1: Configuration of a Rectangular Patch Antenna fed via coaxial line through the ground plane.</em>
+</p>
+
+
+### Design Parameter Ranges
+- *L* = [7.5, 52.5] mm (patch length)
+- *W*/*L* ratio = [0.8, 2] (width to length ratio)
+- *p* = [-6, 0) mm (feed position), enforcing *p* = (-*L*/2, 0)
+
+The designs were sampled at higher density at small *L* and with *p* close to the edge of the patch, then augmented using an algorithm designed to sample additional triplets (*L*, *W*, *p*) inside the convex hull of the existing dataset while enforcing uniformity.
+
+### Simulation Details
+
+The simulations were performed using [openEMS](https://openems.de/), an open-source electromagnetic field solver based on the Finite-Difference Time Domain (FDTD) method. Fixed substrate parameters were used:
+- Dielectric constant εᵣ = 3.68
+- Substrate thickness = 1.61 mm (aligned with OSH Park's 4-layer prototype service)
+
+To calculate S₁₁ frequency response curves, each antenna was excited with a Gaussian pulse centered at f₀ = 5.5 GHz with a cutoff frequency fₖ = 4.5 GHz to cover the frequency range of interest, f∈[1GHz, 10GHz].
+
+From the port data extracted through simulation, the complex amplitudes of the incident and reflected fields were obtained at *N* = 1000 regularly spaced frequencies. The reflection coefficient (S₁₁) was computed as the ratio of the reflected wave (u_ref) to the incident wave (u_inc), converted to decibels:
+
+$$|S_{11}|_\text{dB}(f_i) = 20\log_{10}\left(\left|\frac{u_{\text{ref}}(f_i)}{u_{\text{inc}}(f_i)}\right|\right),\quad i=1,\dots,N$$
+
+<p align="center">
+  <img src="assets/s11_example.png" alt="Example S11 Frequency Response" width="50%">
+</p>
+
+<p align="center">
+  <em>Figure 2: Example S11 vs. Frequency plot</em>
+</p>
+
+## Dataset Structure
+
+Each sample in the dataset contains:
+
+- **Design Parameters**:
+  - `length`: Patch antenna length in mm
+  - `width`: Patch antenna width in mm
+  - `feed_y`: Feed point position in mm relative to the center of the patch, along the length axis
+  
+- **Frequency Response**:
+  - `frequencies`: Array of 1000 frequency points per sample (Hz), ranging from 1 GHz to 10 GHz
+  - `s11`: Array of 1000 S11 values (dB) corresponding to each frequency point
+  
+- **Metadata**:
+  - `id`: Unique identifier for each sample
+
+## Citation
+
+If you use this dataset in your research, please cite:
+
+```
+@misc{labash2025improvinggenerativeinversedesign,
+      title={Improving Generative Inverse Design of Rectangular Patch Antennas with Test Time Optimization}, 
+      author={Beck LaBash and Shahriar Khushrushahi and Fabian Ruehle},
+      year={2025},
+      eprint={2505.18188},
+      archivePrefix={arXiv},
+      primaryClass={eess.SP},
+      url={https://arxiv.org/abs/2505.18188}, 
+}
+```

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