Energy Systems Research

Multi-Spectrum Energy Harvesting

Author Jason McCoy / PFRG
Status Concept — Partially Reconstructed
Updated October 2026

A planetary-scale energy architecture: orbital collectors intercept the full solar and electromagnetic spectrum before the atmosphere can absorb or scatter it, beam concentrated energy to surface rectenna arrays, store it in the earth itself, and manage the network through embedded edge-AI sensor nodes — with a satellite emergency messaging channel as the orbital feedback uplink.

This document is a reconstruction. The original concept was developed in a prior AI conversation and lost when the source device was factory reset. Core architecture has been recovered through conversation; some details and derivations remain incomplete.
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Conceptual Origin — The Dyson Sphere Analog

The design starts from a Dyson sphere — the theoretical megastructure that encapsulates a star to capture its total energy output. The planetary version scales that idea down to Earth's orbital band: rather than capturing a star's entire radiation, we intercept a meaningful fraction of what reaches Earth before the atmosphere has a chance to absorb, reflect, or scatter it.

Earth's atmosphere blocks or degrades a significant portion of the electromagnetic spectrum that arrives from the sun. UV, X-ray, and certain microwave and radio bands never reach the surface in usable form. A system of orbital collectors — satellites in appropriate low or medium Earth orbit — can receive that unfiltered spectrum, convert it, and beam concentrated energy to ground receivers below.

The framing is deliberate: think of it as a partial Dyson sphere for a planet rather than a star. The architecture is layered, modular, and scalable — you don't need the full system to get useful output from any one tier.

Two-Tier Collection Architecture

Tier 1 — Orbital Collectors

Satellites positioned in Earth orbit intercept solar radiation, ambient microwave energy, and radio-frequency signals before atmospheric absorption. The collectors convert this energy and beam it toward designated ground arrays using directed microwave or laser transmission. The orbital tier handles the highest-density, least-filtered energy available to the system.

Tier 2 — Ground Rectenna Arrays

Surface rectenna (rectifying antenna) arrays receive the beamed energy from orbit and convert it from electromagnetic form to usable electrical current. The ground arrays also capture terrestrial radio-frequency ambient energy — broadcast signals, cellular, and other RF that permeates the environment — that would otherwise dissipate unused. Together, the two tiers form a multi-spectrum funnel: unfiltered orbital energy from above, ambient RF harvested at the surface.

Earth Battery — Ground as Storage Medium

Harvested energy is stored in the earth itself. The concept treats the ground as a primary storage medium by exploiting two properties of soil and rock: thermal mass and electrical conductivity.

Thermal mass storage embeds heat into the earth during periods of high collection and extracts it for power generation when demand rises. Electrical conductivity enables direct charge injection into the ground through deep electrode grids, effectively turning a volume of earth into a distributed capacitive or electrochemical battery.

This is not a new idea in isolation — ground-source heat systems and earth-electrode experiments have existed for over a century — but the application here is as the primary storage layer for a harvesting network, not a supplemental or niche store. The scale and the deep electrode injection approach for electrical storage are the distinguishing elements.

Multi-Array Rectenna Network

The ground collection layer is not a single monolithic array but a distributed network of modular rectenna tiles capable of operating cooperatively and independently.

New Development — October 2026 (Army xTech Submission) The orbital feedback loop — a control uplink from the ground network back to the orbital collectors — uses an existing satellite emergency messaging infrastructure rather than a dedicated proprietary channel. This approach uses infrastructure already in orbit for the control path, reducing the cost and complexity of establishing two-way coordination between the ground arrays and the orbital tier. Details subject to disclosure constraints prior to competition review.

Edge-AI Sensor Nodes

Each node in the network contains an embedded AI system that processes multi-environmental data streams locally — at the edge — without routing raw data to a central system. The edge-AI layer is what makes the network self-aware and pre-failure capable.

Node Capabilities

Parasitic Self-Power

Sensor nodes are powered parasitically from the ground battery they help control. They draw a small trickle from the earth battery directly through their ground electrode contacts. This means a node is powered as long as the battery has any charge — the node does not require a separate power supply, a battery of its own, or a wired connection to the grid. The system that the node monitors is also the system that powers the node.

Inter-Node Communication — Cooperative, Non-Authoritative

Nodes communicate with each other, but no node overrides another. The protocol is cooperative and advisory: a node shares what it observes and what it infers, offers that information to neighbors and to the network layer above, and flags conditions that need attention — but it does not issue commands to peer nodes and cannot force a peer to change its behavior.

When a node detects a condition requiring attention, it reports what needs to be fixed and where. The decision about what action to take, and when, belongs to the network layer and ultimately to human operators. Nodes help; they do not govern.

Data Payload

Each node's outbound data includes: current electromagnetic field readings, soil conductivity and temperature, moisture level, barometric and thermal gradients, load balance state, anomaly flags, pre-failure confidence scores, and node health status. The payload is structured for minimal bandwidth — the embedded AI compresses and prioritizes before transmission, sending only meaningful signal rather than raw sensor streams.

System Energy Flow

SOLAR / EM SPECTRUM (unfiltered) │ ┌───────▼────────┐ │ Orbital │ ← Tier 1: satellites intercept pre-atmosphere │ Collectors │ └───────┬────────┘ │ directed microwave / laser beam-down ┌───────▼────────┐ │ Ground │ ← Tier 2: rectenna arrays + ambient RF harvest │ Rectenna Arrays │ └───────┬────────┘ │ charge injection via deep electrode grid ┌───────▼────────┐ │ Earth Battery │ ← primary storage: thermal mass + conductivity └───┬─────────┬──┘ │ │ ┌───▼───┐ ┌──▼──────────┐ │ Load │ │ Edge-AI │ ← parasitic draw; monitors + reports │ Out │ │ Sensor Nodes │ └───────┘ └──────┬──────┘ │ cooperative inter-node comms │ satellite emergency messaging uplink ↑ orbital ▼ Network Oversight / Human Operators

Areas Still Being Reconstructed

The following elements were part of the original concept but have not been fully recovered. They are noted here to preserve continuity of reconstruction and to prompt further development.

These gaps represent work to be resumed. The architecture above is sufficient to document the concept's shape, distinguish it from adjacent prior art, and anchor further development.

Implementation details, orbital feedback specifics, and competition-related elements may remain withheld where disclosure would compromise research integrity or intellectual property. This page reflects what can be disclosed as of October 2026.
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