Cdsenet TX2400-JW-3 2.4GHz WiFi Mini Antenna 2.5dBi SMA-J TPEE 29mm Rubber Antenna Compact Size

29mm Ultra-Compact Profile — 2g Lightweight for Space-Critical Devices

At 29mm tall and 2g, the TX2400-JW-3 is designed for devices where antenna height clearance is the primary constraint — including compact WiFi routers, smart TV boxes, portable radio stations, and handheld IoT terminals where a standard 110mm rubber antenna would protrude excessively. Despite its compact size, the antenna achieves 2.5 dBi gain with VSWR 1.17 at 2.45GHz, meeting the performance requirements of WiFi 802.11b/g/n, Bluetooth 5.x, and ZigBee 3.0. The TPEE radome provides weather resistance and flexibility for protected outdoor installations.

SMA-J Direct-Mount — 2.45GHz Center-Tuned for WiFi Channel Optimization

The SMA-J (male, inner pin and thread) connector provides a direct 50Ω interface to SMA-K female ports on compact routers, access points, and WiFi modules. The antenna is center-tuned at 2.45GHz — the midpoint of the 2.4–2.5GHz ISM band — ensuring consistent VSWR performance across all WiFi 2.4GHz channels (2.412–2.484GHz), Bluetooth (2.402–2.480GHz), and ZigBee (2.405–2.480GHz). The straight (non-bendable) design maintains a fixed vertical orientation for consistent omnidirectional radiation pattern.

Measured with a vector network analyzer (Agilent E5071C equivalent): VSWR = 1.17 @ 2.45 GHz, confirming ≤1.5 across the full 2.4–2.5 GHz operating band. Return loss ≈ 22 dB at the measured frequency point — indicating less than 0.6% of input power is reflected at the antenna port.

Q: When should I choose the TX2400-JW-3 over the TX2400-JK-11?

A: Choose the TX2400-JW-3 when antenna height is the primary constraint — its 29mm profile fits in enclosures where the TX2400-JK-11 (110mm) would protrude excessively. Both deliver 2.5 dBi gain with similar VSWR performance (1.17 vs 1.15). The JW-3 is a straight (non-bendable) design, while the JK-11 supports bending. Choose JK-11 when height is not a constraint and bending flexibility is needed; choose JW-3 for the most compact SMA-J 2.4GHz antenna in the range.

Q: Is the TX2400-JW-3 compatible with RP-SMA ports on consumer WiFi routers?

A: No. The TX2400-JW-3 uses an SMA-J (standard SMA male) connector, which is not compatible with RP-SMA (Reverse Polarity SMA) ports commonly found on consumer WiFi routers. Confirm your device has an SMA-K (standard SMA female) port before ordering. For RP-SMA router ports, use an RP-SMA male antenna or an SMA-to-RP-SMA adapter.

Q: Does antenna orientation affect performance?

A: Yes. As a vertically polarized omnidirectional antenna, the TX2400-JW-3 radiates most effectively in the horizontal plane perpendicular to the antenna rod. Mounting the antenna vertically maximizes horizontal coverage. Avoid pointing the antenna tip directly at the receiving station, as the radiation pattern has a null at the tip (along the antenna axis). For devices mounted flat on a surface, consider an antenna with a right-angle connector to maintain vertical orientation.

Q: Does the 29mm height limit gain compared to longer antennas?

A: Yes. At 2.4GHz, a quarter-wave radiator measures approximately 31mm. The TX2400-JW-3's 29mm radiator is close to quarter-wave length, achieving 2.5 dBi gain — comparable to a standard quarter-wave antenna. Longer antennas such as the TX2400-JKD-20 (200mm, 5.0 dBi) achieve higher gain by using a 5/8-wave equivalent design, but require significantly more height clearance. The JW-3 represents the practical minimum size for a 2.5 dBi SMA-J antenna at 2.4GHz.

Q: What is the operating temperature range and is it suitable for outdoor use?

A: The TX2400-JW-3 is rated for -40°C to +85°C. The TPEE radome is weather-resistant and UV-stable, suitable for protected outdoor installations. For direct rain exposure, protect the SMA connector junction with self-amalgamating tape to prevent moisture ingress. The 2g weight minimizes wind-induced vibration stress on the SMA connector in outdoor deployments.