Satellite IoT and direct-to-device connectivity technology and investment research

Technical bottleneck

• Bottleneck type: Constellation deployment / Spectrum rights
• Technical constraint: Direct-to-device requires satellites with >100 sq meter phased-array antennas in LEO to close the link budget to a standard smartphone/ IoT modem at 0.2W transmit power; Doppler shift at 7.5 km/s LEO velocity must be pre-compensated with <1 ppb frequency accuracy; satellite NB-IoT at 500 km altitude has 30-50 ms latency vs. <10 ms for terrestrial — adequate for telemetry, not real-time control
• Economic constraint: Spectrum rights are the primary moat — AST SpaceMobile has agreements with AT&T, Vodafone, and 40+ MNOs; Starlink D2C uses T-Mobile's PCS spectrum; the satellite + terrestrial MNO partnership model locks in incumbents; constellation capex is $3-10B per system, limiting competition

Adoption

• Driver: FCC supplemental coverage from space (SCS) regulatory framework enabling direct-to-device; agriculture and maritime IoT requiring ubiquitous coverage; emergency SOS via satellite on consumer smartphones creating awareness and demand
• Blocker: Terrestrial NB-IoT and LoRaWAN coverage expanding to rural areas; satellite IoT module cost ($10-50) vs. terrestrial LPWAN ($2-5); direct-to-device satellite capacity limited (tens of Mbps per cell vs. Gbps for terrestrial); constellation deployment risk (launch cadence, funding)

Research Update — 2026-08-19 (connectivity/RF deep-dive)

_Source: SEC XBRL + x_search earnings + UW flow (2026-08-18)._

STRUCTURAL EVENT — D2D layer absorbing via M&A:

• GSAT → Amazon ~$11.6B @ $90/share (HSR cleared 2026-07-17, close 2027). Guidance suspended. Standalone thesis moot — now a merger-arb (~8% spread to $90).
• IRDM → Rocket Lab (vertical integration: launch + sat manufacturing + constellation + IoT). Q2: rev $225M +3.8%, 2.63M subs (+6%), IoT +9%; NTN Direct D2D launching late 2026; Aireon adds $100M+ rev. Guidance withdrawn.
• ASTS remains the ONLY standalone D2D pure-play (already tracked, launch-gated, Q2 rev +2,626% YoY, $1.3B backlog).

Read: The direct-to-device thesis is being validated by acquisition — the spectrum-rights moat (the economic constraint this note identified) is exactly what Amazon and Rocket Lab are buying. But the public-market standalone plays are disappearing: GSAT and IRDM are now deal-premium equities, not thesis vehicles. The remaining D2D exposure is ASTS (standalone, convex but launch-gated) or RKLB (integrated).

Open questions

• [ ] Does the GSAT→Amazon deal signal Amazon entering D2D at scale (Kuiper + MSS spectrum), and does that change ASTS's competitive position?
• [ ] Post-RKLB, is the satellite-IoT + D2D thesis best expressed through Rocket Lab rather than standalone operators?

Public companies exposed

ASTS (AST SpaceMobile — direct-to-smartphone broadband)

GSAT (Globalstar — Apple emergency SOS partner)

IRDM (Iridium — LEO narrowband

Certus IoT)

SATL (Satellogic — EO

not IoT)

QCOM (Qualcomm — Snapdragon Satellite

3GPP NTN modems)

STM (STMicro — satellite NB-IoT modules)

MDTKF (MediaTek — 3GPP NTN satellite IoT chips)

Validation signals

AST SpaceMobile constellation deployment and commercial service launch; 3GPP Release 17/18 NB-IoT NTN chipset availability; MNO roaming agreements for satellite direct-to-device

Invalidation signals

Terrestrial LPWAN extended range (LoRa 2.4 GHz, Amazon Sidewalk) covering rural/remote; satellite IoT module cost failing to reach <$5; AST SpaceMobile financial runway risk preventing full constellation deployment