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AI Video, Drone Telemetry, and Incident Broadband Cells Increasing Temporary RF Noise Exposure Around P25 Command Post Receive Paths

Incident broadband load becomes the receive path problem Incident scenes today have more transmitters than there are frequency slots in the static LMR plans. In addition to P25 portable repeaters and interoperability gateways, incident scenes have vehicular routers, body camera docks, unmanned aircraft controllers, broadband modems, satellite terminals, temporary LTE or 5g cells, etc. In

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July 9, 2026 No Comments

Satellite to Cellular Public Safety Coverage Extensions and RF Coexistence Pressure Around Ground Based LMR Gateway Sites

Satellite Access Moves to a Public Safety Coverage Layer The new FCC framework for supplemental coverage from space (SCS) allows satellite and terrestrial operators to utilize terrestrial mobile spectrum via defined authorizations and interference protection. This framework utilizes FirstNet licensed 700 MHz public safety BroadBand spectrum, often referred to as Band 14, for SCS purposes

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July 7, 2026 No Comments

Band 14 Growth Changes the Receiver Protection Problem

Band 14 Growth Changes the Receiver Protection Problem The growth of public safety broadband isn’t eliminating LMR from critical communications architecture. Rather, it’s moving broadband systems closer to narrowband P25 receivers that were designed for earlier assumptions regarding rf density. FirstNet will continue to utilize Band 14 spectrum for public safety broadband purposes as part

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June 23, 2026 No Comments

Code Driven Coverage Expansion and RF Density

Code Driven Coverage Expansion and RF Density Radio Frequency (RF) emergency responder communication coverage systems have evolved from an infrequent special purpose installation to a standard component of public safety communications planning in new buildings, renovated facilities, tunnels, campuses, hospitals, schools, high-rise structures, and hardened public venues. The International Fire Code utilizes emergency responder communication

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June 19, 2026 No Comments

Public Safety Sites Transition From Individual Network Systems to Shared Radio Frequency (RF) Environments

Public Safety Sites Transition From Individual Network Systems to Shared Radio Frequency (RF) Environments Public safety communications have transitioned away from stand-alone local mobile radio (LMR) networks. Many agencies continue to rely on P25, analog mutual aid channels, conventional LMR channels, trunked LMR systems and dispatch center RF infrastructures for mission critical voice. At the

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June 15, 2026 No Comments

LMR Feedline Moisture Intrusion and Hidden Coverage Loss in Aging Public Safety Tower Infrastructure

LMR Feedline Moisture Intrusion and Hidden Coverage Loss in Aging Public Safety Tower Infrastructure Moisture intrusion into feedlines is typically treated as a maintenance-related failure of the Feedline itself; however, in public safety lmr systems, it has evolved into a systematic coverage degradation process. Water entering coaxial transmission lines, jumper assemblies, weather sealing transition areas,

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June 9, 2026 No Comments

Co-located (and) Broadband Pressure Inside Public Safety RF Sites

  Co-located (and) Broadband Pressure Inside Public Safety RF Sites In today’s growing public safety communications environment, many densely populated public safety communications sites will house both P25 LMR transmit and receive infrastructure and mission-critical broadband systems. For example, there could be commercial LTE carriers; public safety broadband equipment; microwave backhaul systems; and in-building coverage

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June 1, 2026 No Comments

Cavity Filter Thermal Drift Effects on Adjacent Channel Rejection in High Duty Cycle LMR Sites

Thermal Stress in Modern Public Safety RF Sites High duty cycle LMR sites increasingly operate inside shared RF environments that combine P25 trunked systems, conventional mutual aid channels, utility radio systems, microwave equipment, and broadband public safety services. The result is a higher continuous RF load on passive infrastructure than many legacy sites were originally

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May 26, 2026 No Comments

Antenna Isolation Degradation Between Adjacent Public Safety Arrays During Tower Loading Expansion

Tower Loading Expansion and Isolation Margin Reduction Public safety tower sites are carrying more RF systems than their original antenna plans anticipated. Regional P25 systems, conventional mutual aid channels, utility radio networks, microwave paths, cellular broadband equipment, and in building donor antennas are often added over multiple budget cycles. Each addition changes the physical and

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May 21, 2026 No Comments

Multicoupler Dynamic Range Compression in High Density Public Safety Receive Sites Under Hybrid LMR and Broadband Loading

Multicoupler Dynamic Range Compression in High Density Public Safety Receive Sites Under Hybrid LMR and Broadband Loading Public safety receive sites were historically engineered around predictable LMR channel loading, controlled antenna distribution, and relatively stable adjacent site conditions. That assumption is weakening as regional systems combine P25 trunking, conventional interoperability channels, public works LMR, utility

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May 19, 2026 No Comments
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