RXM-900-HP-II Linx Technologies Inc, RXM-900-HP-II Datasheet - Page 18

• Manufacturer Part Number: RXM-900-HP-II
• Description: RECEIVER RF 900MHZ 8-CH PACK
• Manufacturer: Linx Technologies Inc

Specifications of RXM-900-HP-II

• Frequency: 902MHz ~ 928MHz
• Sensitivity: -95dBm
• Data Rate - Maximum: 50 kbps
• Modulation Or Protocol: FM, FSK
• Applications: Home / Industrial Automation, Remote Access, Security Alarms
• Current - Receiving: 18mA
• Data Interface: PCB, Through Hole
• Antenna Connector: Through Hole
• Voltage - Supply: 2.7 V ~ 16 V
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 18-SIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Memory Size: -
• Other names: RXM-900-HP2; RXM-900-HP2

Helical Style
products where cost or size is critical, a designer will generally want to have a loop
professionally designed and optimized.
HP Antenna Selection Chart
PARAMETER
Ultimate performance
Ease of design setup
Size
Immunity to proximity effects
HP-II Range
Loop Style
(
open ground to similar antenna
=FAIR
PCB making it the most cost-effective of antenna styles. There
are many different styles and shapes of loops which can be
utilized, including spirals and rectangles. A loop has excellent
immunity to proximity detuning (i.e., a user’s body) and is
easily concealed inside products which have a plastic case.
Despite these advantages a loop is difficult to match and tune
without expensive RF test equipment. An improperly designed
loop will have a very high SWR and may induce harmonics. For
this reason a helical or whip style is usually a better choice for
applications requiring maximum range-performance. For
brass. This antenna is very efficient given its small size. The
helical is an excellent choice for products requiring good
range-performance and a concealed internal antenna
element. Care must be exercised in placement, however, as a
helical detunes badly when located in proximity with other
conductive objects. Because a helical has a high "Q" factor its
bandwidth is very narrow and inter-coil spacing has a
pronounced effect on antenna performance. For this reason it
is usually best to utilize a premade helical which has been
professionally optimized to achieve maximum performance.
A helical is a wire coil usually wound from steel, copper or
A loop or track-style antenna is usually printed directly on the
=GOOD
)
400 ft.
LOOP
=EXCELLENT
HELICAL
600 ft.
1,000+ ft.
WHIP