Detachable Anti‑Radiation Case “Sandwich” — Concept Demo

Initial state: phone only with outward energy. Step 1 adds a detachable magnetic base (metal plates + magnets) on the back (red). Step 2 brings a front shielding layer closer (blue). As conductive layers approach, the phone compensates by raising transmit power. Applies to detachable anti‑radiation cases only.

RF Output (simulated)
Stable low
Mode: Auto
Front gap: 25.0 mm
Manual mode enables after the auto sequence completes or when you press Pause.
Shielding (front cover) Metal plates + magnet base (back) Reflected energy
Public Service Message by RF Safe — rfsafe.com
Ready
PHONE
Conceptual illustration only (no SAR or wattage shown). We visualize outward phone energy and its reflections—not “incoming” waves.

Detachable “Anti‑Radiation” Cases: The Sandwich Effect

Add metal plates + magnets to the back of a phone, then put shielding in front, and you’ve sandwiched the transmitter between conductive layers that impede the signal. The phone responds by raising transmit power to maintain the link—often making exposure worse. In many real‑world cases, you’d be better off with no case than with a detachable “anti‑radiation” case.

  • Back metal + magnets detune antenna patterns and add reflections.
  • Front shield, when used with back metal, completes a two‑sided trap.
  • Closed‑loop control: the phone boosts power to overcome the impedance.

Engineering explanation for education. Not a medical claim.

How Detachable Designs Create the Trap

Step‑by‑step

  1. Attach detachable magnetic base — a steel plate and magnet ring sit behind the phone.
  2. Flip the front shield between the phone and your head/body for calls.
  3. You’ve now placed the transmitter between two conductive layers (back metal + front shield).

Why output power rises

  • Reflections & blockage: energy meets conductive surfaces and reflects back.
  • Detuning & pattern distortion: added metal near antennas changes the field.
  • Closed‑loop control: phones increase transmit power to keep the link reliable.

The goal is connection quality. If you impede it with hardware, the phone compensates with power.

Visual: The Sandwich Effect

Two layers + one transmitter = more compensation. That’s the core problem with detachable designs.

Would you be better off with no case?

In many scenarios, yes. If the choice is between a detachable “anti‑radiation” case that sandwiches the phone and no case, the latter often results in less transmit power than a trapped transmitter fighting hardware. It’s counter‑intuitive, but it’s how radios behave.

What to look for instead

  • No back plates/magnets behind the phone.
  • No metal strap loops near antenna/radiator zones.
  • Shielded earpiece slot (conductive mesh) for talk‑through continuity.
  • Ultra‑thin by intent to avoid provoking higher TX power.
  • Flip‑to‑shield workflow—put the shield between phone and body during calls/carry.

Habits • Hardware • Rights

Practical habits

  • Use speaker/stand or wired accessories when possible.
  • Carry shield‑side in; airplane mode at night if feasible.
  • Hard‑wire/Li‑Fi indoors whenever you can.

Rights & Roadmap

Make a Case for Your Rights — First & Tenth; enforce Public Law 90‑602; restart NTP RFR science; modernize standards.

Learn the RF Safe Roadmap

Buyer Beware: Red Flags

Educational content; engineering comparison, not a medical claim.