|
|
Part: JA1305-5
Category:
RF & Microwaves
-> Couplers
Description: Description = Xinger Directional Couplers ;; Size LXWXH = 0.56"x0.35"x0.081" ;; Packaging = Surface Mount ;; Frequency MHZ = 2000-2300 ;; Power Handling Watts = 50
Company: Anaren Microwave
Datasheet: Download JA1305-5 datasheet File size : 119 kB
Request For quote: Find where to buy JA1305-5
Datasheet text preview:
Model JA1305-5
Rev. A
Directional Couplers 5 dB
Description
The JA1305-5 is a low profile 5dB directional coupler in an easy to use surface mount package covering WCDMA and other 3G applications. The JA1305-5 is ideal for 3 way inline splitting and combining amplifiers and for power injection. The coupler can be used in most high power designs. Parts have been subjected to rigorous qualification testing and units are 100% tested. They are manufactured using materials with x and y thermal expansion coefficients compatible with common substrates such as FR4, G-10 and polyamide.
ELECTRICAL SPECIFICATIONS** Features:
· · · · · · · · 2.0 - 2.3 GHz Optimized for 3G Low Insertion loss High Directivity Surface Mountable Tape And Reel Convenient Package 100% Tested Frequency
GHz
Mean Coupling
dB
Insertion Loss
dB Max
VSWR
Max:1
Freq. Sensitivity
dB Max
2.11 2.17 2.0 2.3 Deviation from Linear Phase (50 MHz. Band)
Deg. Max
5.0 ± 0.25 5.1 ± 0.4 Directivity
dB Min
0.23 0.25 Power Handling
Watts
1.20 1.25 JC
șC / Watt
±0.10 ±0.20 Operating Temp.
șC
NA ±0.10
20 18
55 50
15.35 15.35
-55 to +85 -55 to +85
**Specification based on performance of unit properly installed on microstrip printed circuit boards with 50 nominal impedance. Specifications subject to change without notice.
Outline Drawing
Top View (Near-side) Side View Bottom View (Far-side)
Pin 1
.560±.010 [14.22±0.25]
.081±.008 [2.05±0.20] Pin 2 .350±.010 [8.89±0.25] Pin 2
.024±.004 TYP [0.61±0.10] Pin 1 .050±.008 [1.27±0.20] .050±.008 [1.27±0.20]
GND Pin 4 Denotes Array Number Pin 3
GND Pin 3
Pin 4
Dimensions are in Inches [Millimeters] JA1305-5 Rev A Mechanical Outline
Part Is Symmetric About All Axis
Available on Tape and Reel For Pick and Place Manufacturing.
USA/Canada: Toll Free: Europe:
(315) 432-8909 (800) 544-2414 +44 2392-232392
Model JA1305-5
Rev. A
Typical Performance: 1.8 GHz. to 2.5 GHz.
Coupling JA1305-5
-4.7
Return Loss JA1305-5
0
-4.8
-10
C o u p l i n g (dB )
-4.9
R e tu rn Loss (dB)
-20
-5
-30
-5.1
-5.2
-40
-5.3 1800
1900
2000
2100
2200
2300
2400
2500
-50 1800
1900
2000
2100
2200
2300
2400
2500
Frequency (MHz)
Directivity JA1305-5
-15
-1.5
Frequency (MHz)
Transmission Loss JA1305-5
-20
-1.6
D i re c ti v i ty (dB )
-25
T r a n s m is s io n Loss (dB)
1900 2000 2100 2200 2300 2400 2500
-1.7
-30
-1.8
-35
-40
-1.9
-45 1800
-2 180 0 190 0 200 0 2100 2200 2300 2400 2 500
Frequency (MHz)
Frequency (MHz)
COUPLING Choice of a coupling value in an application normally depends on the power level of the main (sampled) line. For example, if the coupler is being used to monitor main line power, the coupling value is selected to provide sufficient power to the monitoring device and yet minimize system loss. Note that any coupler reduces power flowing in the main line by the amount coupled off; a 6dB coupler reduces main line power by 1.25 dB (25%) where a 20dB coupler reduces it by only 0.044dB (1%). Anaren uses mean coupling and frequency sensitivity with the coupling specification. The mean coupling value is arrived at by periodically sampling the coupling value over the specified band and averaging the readings. Frequency sensitivity is the peak to peak variation in coupling over the specified band. USA/Canada: Toll Free: Europe: (315) 432-8909 (800) 544-2414 +44 2392-232392
Available on Tape and Reel For Pick and Place Manufacturing.
VSWR & DIRECTIVITY In directional couplers, directivity is specified in lieu of isolation. Directivity is a measure of how well the coupled power is isolated from reflections at the main line output port. For example, open or short circuiting the output port of a coupler with 20dB directivity would only affect the coupled output power by 1% and only 0.1% for 30dB directivity. High directivity is especially important if the coupler is being used to measure the VSWR of a device at its output port. In this application, accurate measurements of forward and reverse power are required. In theory, VSWR and directivity characteristics of a coupler are perfect; the input and output ports are perfectly matched and no power is coupled to the isolated port. In practice, factors associated with the
Model JA1305-5
Rev. A
design and manufacturing processes limit VSWR and directivity. The internal meandering of the coupled line and limitations of building perfect 50 transitions at the input and output ports of the device are the most significant factors against perfect VSWR and directivity. Typically, VSWR and directivity of 1.15 :1 and 23 dB respectively are achieved in practice. INSERTION LOSS Coupler insertion loss is defined as the log of the input power divided by the sum of the power at the two output ports. In practice, typical loss is approximately 0.15 dB. Specification limits are somewhat higher due to imperfect test conditions; surface mount couplers must be tested in test fixtures which negatively affect results. PIN CONFIGURATION
all of the RF ports. Also, there must be a very good ground plane under the part to ensure proper electrical performance. If either of these two conditions are not satisfied, insertion loss, coupling, VSWR and directivity may not meet published specifications. Overall ground is improved if a dense population of plated through holes connect the top and bottom ground layers of the PCB. This minimizes ground inductance and improves ground continuity as well as power handling. Performance can also be improved when grounded coplanar waveguide is used as the transmission medium and a low loss dielectric is used. All of the Xinger couplers are constructed from ceramic filled PTFE composites which possess excellent electrical and mechanical stability having X and Y thermal coefficient of expansion (CTE) of 17 ppm/oC. When a surface mount directional coupler is mounted to a printed circuit board, the primary concerns are; insuring the RF pads of the device are in contact with the circuit trace of the PCB and insuring the ground plane of neither the component nor the PCB is in contact with the RF signal. As long as the geometry of the unit fits onto the layout of the circuit trace on the PCB, and the conditions of the previous paragraph are followed, the coupler's performance is ensured. An example of how the PCB footprint could look is shown below. In specific designs, the 50 lines need to be adjusted to the unique dielectric coefficients and varying thickness as well as adjustments for pick and place equipment tolerances. SUGGESTED FOOTPRINT
To insure proper electrical and thermal performance there must be a ground plane under the part
Most of the surface mount directional couplers have pin orientations which are symmetrical. When a port is chosen as the input port, automatically the output, coupled and isolated ports are known. For example, if the input port for a device was selected to be Pin 1, Pin 2 automatically becomes the output port, Pin 4 becomes the coupled port, and Pin 3 is the isolated port. Similarly, if Pin 3 was to be selected as the input port, the adjacent port on the long side (Pin 4) is the output port, the adjacent port on the short side (Pin 2) is the coupled port, and the opposite port (Pin 1) is the isolated port. Any port can be selected as the input port, as shown in the table below, which shows every pin configuration possible. MOUNTING For optimal performance of the surface mount couplers, there must be 50 transmission lines leading to and from
Multiple plated thru holes to ground plane
2x .313 [7.95]
.034 TYP [0.86]
.063 SQ TYP [1.60]
2x .523 [13.28]
50
Transmission Line
Dimensions are in Inches [Millimeters] JA1305-5 Rev A Mounting Footprint
Available on Tape and Reel For Pick and Place Manufacturing.
USA/Canada: Toll Free: Europe:
(315) 432-8909 (800) 544-2414 +44 2392-232392
Others parts begin by ja
JA-1 JA-2 JA-3 JA-4 JA-5 JA-6 JA-7 JA-8 JA-9 JA-10 JA-11 JA-12 JA-13 JA-14 JA-15 JA-16 JA-17 JA-18 JA-19 JA-20 JA-21 JA-22 JA-23 JA-24 JA-25 JA-26 JA-27 JA-28 JA-29 JA-30 JA-31 JA-32 JA-33 JA-34 JA-35 JA-36 JA-37 JA-38 JA-39 JA-40 JA-41 JA-42 JA-43 JA-44 JA-45 JA-46 JA-47 JA-48
|
|
|
